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Cospheric offers an exclusive product line of brightly-colored polyethylene microspheres. Cospheric's polyethylene micropheres range in size from 10micron to 1000micron (1 millimeter) and in some cases up to 1.2mm. The uniqueness of our product is that the colorant is bright, fully embedded into the microsphere, uniformly distributed, and will not fade over time or leach out of the particle into the solution. The colored microspheres are conveniently provided in a glass vial or a glass jar as a free-flowing dry powder, which does not have an expiration date and can be safely stored at room temperature indefinitely.

Currently we have a large stock of sizes in clear (uncolored polyethylene), white, red, blue, green, black (paramagnetic), yellow, red, violet, pink, orange, and grey microspheres. This is one of our core product lines and we welcome requests for custom colors and/or custom densities between 0.98g/cc and 1.2g/cc, which are often used for medical technology applications. Browse a large selection of microsphere products on-line or contact a microsphere expert for a recommendation or a custom quote. Place an order on-line 24/7. We ship microspheres worldwide on a daily basis!


Products 1-56 of 95
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Highly Opaque White Polyethylene Microspheres, Polymer Beads, Particles
Item #: WPMS -
Price: $103.95-$372.75
Item #: WPMS - View

Polyethylene microspheres are hydrophobic and need to be coated with a surfactant prior to suspending in water. We recommend Tween 80 Bio-compatible Surfactant. Several densities available: WPMS -... [more info...]

Microspheres, Spheres, Micro beads - PMMA - Poly(methyl Methacrylate) - Acrylic Spherical Particles
Item #: PMMA -
Price: $112.50-$289.00
Item #: PMMA - View

PMMA polymer is an amorphous, transparent and colorless thermoplastic that is hard and stiff. It has good abrasion and UV resistance and excellent optical clarity. PMMA spheres are soluble in... [more info...]

Polystyrene Microspheres 1.07g/cc - highly spherical thermoplastic biocompatible microparticles
Item #: PSMS -
Price: $261.00
Item #: PSMS - View

The spheres are in their most pure form, with no surface functionalization, coatings or colorants added. Crosslinked polystyrene is inert, chemically stable, and safe for handling. The primary... [more info...]

Bulk Grades of Solid Soda Lime Glass Microspheres 2.5g/cc. Optional Fluorochemical and Silane Coatings.<br>Mean Diameters 3-6um, 8-12um, 35-45um, 65-75um.
Item #: P2000 -
Price: $52.50-$174.00
Item #: P2000 - View

P2011SL: Average diameter between 3 and 6 microns, with a top size of 20 microns. P2015SL: Average diameter between 8 to 12 microns, with a top size of 36 microns. P2050SL: Average diameter between... [more info...]

Black Paramagnetic Polyethylene Microspheres 10um to 1mm in Diameter. Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed.
Item #: BKPMS -
Price: $103.95-$372.75
Item #: BKPMS - View

Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed. No residual magnetization is... [more info...]

Janus Particles - Black Paramagnetic Microsphere Core with Partial White Coating (Bipolar and Bichromal Particles)
Item #: HCMS-Polymer -
Price: $295.00-$495.00
Item #: HCMS-Polymer - View

Janus particles are microspheres with dual-functionality. We specialize in creating hemispherical coatings on microspheres of any material with diameters greater than 45micron. Custom colors, cores,... [more info...]

Monodisperse Silica Microspheres - Spherical Silica Beads
Item #: SiO2MS -
Price: $157.50-$258.50
Item #: SiO2MS - View

Silica spheres are manufactured using proprietary technologies which allow the essential properties of amorphous silica to be maintained while simultaneously achieving controlled spherical shape and... [more info...]

Bondline Spacer Spheres - Monodisperse Solid Soda Lime Microspheres - Calibration Grade Beads
Item #: S-SLGMS -
Price: $131.25-$495.00
Item #: S-SLGMS - View

Bondline spacer grade solid soda lime glass microspheres are available with tight particle size ranges to achieve bondline thickness (gap) from 10micron (0.01mm) to 500micron (0.5mm). Bondline... [more info...]

Conductive Silica Spacer Beads - Silica Microspheres Monodisperse
Item #: SiO2MS-AG -
Price: $279.50
Item #: SiO2MS-AG - View

SiO2MS-AG-4.1 2.0um - 200mg product has about 85nm silver coating SiO2MS-AG-3.5 4.5um - 500mg product has about 110nm silver coating SiO2MS-AG-2.3 9.0um – 500mg Product hass about 75nm silver... [more info...]

UVPMS-BG Fluorescent Spectra (Excitation & Emission curves)
Item #: UVPMS-BG-1.025 -
Price: $103.95-$298.50
Item #: UVPMS-BG-1.025 - View
Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.015g/cc
Item #: UVPMS-BG-1.015 -
Price: $103.95
Item #: UVPMS-BG-1.015 - View

Density: 1.01-1.02g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.01g/cc
Item #: UVPMS-BG-1.01 -
Price: $103.95-$215.00
Item #: UVPMS-BG-1.01 - View

Density: 1.00-1.02g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.02g/cc
Item #: UVPMS-BG-1.02 -
Price: $103.95
Item #: UVPMS-BG-1.02 - View

Density: 1.015-1.025g/cc Daylight Color: Fluorescent Green (505nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres Density 1.035g/cc<br>Bright Green Polymer Spherical Microbeads
Item #: UVPMS-BG-1.035 -
Price: $103.95-$215.00
Item #: UVPMS-BG-1.035 - View

Density: 1.03-1.04g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: >90% Spherical Particles: >90%... [more info...]

Fluorescent Red Polyethylene Microspheres Density 0.99g/cc Bright Fluorescent Red Particles 605nm Peak
Item #: UVPMS-BR-0.995 -
Price: $103.95-$372.75
Item #: UVPMS-BR-0.995 - View

Density: 0.985g/cc - 1.005g/cc (Designed for Water Suspension)Daylight Color: Fluorescent Red (607nm Peak) Fluorescent Response: Fluorescent Red under 300-550nm wavelengths. Works well with Green... [more info...]

Fluorescent Red Polyethylene Microspheres Density 1.20g/cc Bright Fluorescent Red Particles 605nm Peak
Item #: UVPMS-BR-1.20 -
Price: $103.95-$215.00
Item #: UVPMS-BR-1.20 - View
Fluorescent Red Polyethylene Microspheres Density 1.090g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Item #: UVPMS-BR-1.090 -
Price: $103.95-$215.00
Item #: UVPMS-BR-1.090 - View
Fluorescent Red Polyethylene Microspheres Density 1.050g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Item #: UVPMS-BR-1.050 -
Price: $103.95-$215.00
Item #: UVPMS-BR-1.050 - View
Borosilicate Solid Glass Microspheres 2.2g/cc<br>Many Sizes 20micron to 6150mm
Item #: BSGMS -
Price: $131.25-$313.95
Item #: BSGMS - View

Solid borosilicate glass microspheres are available in a large variety of particle size ranges from 10um to 6150um. Microspheres are supplied as a dry powder. [more info...]

300 Series Stainless Steel Microspheres
Item #: SSMMS -
Price: $103.95-$261.00
Item #: SSMMS - View

Particles in Size Range: >90% Sphericity: >90% Density: 7.7-7.9g/cc Vickers Hardness: ~200HV [more info...]

Fluorescent Yellow Microspheres Density 1.00g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Item #: UVPMS-BY2-1.00 -
Price: $103.95-$372.75
Item #: UVPMS-BY2-1.00 - View
Fluorescent Yellow Microspheres Density 1.02g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Item #: UVPMS-BY2-1.02 -
Price: $215.00
Item #: UVPMS-BY2-1.02 - View
Fluorescent Polymer Spheres (Green) 1.100g/cc density
Item #: UVPMS-BG-1.100 -
Price: $215.00-$447.75
Item #: UVPMS-BG-1.100 - View
Retroreflective Half-Shell Aluminum Coated Solid Glass Microspheres
Item #: P2453BTA -
Price: $103.95-$557.00
Item #: P2453BTA - View

The spheres are offered in dry powder form with the following coating options: Uncoated - no surface treatment Silane Coating (S2) - for improved dispersion in aqueous systems (~76 degree contact... [more info...]

Fluorescent Orange Polyethylene Microspheres Density 1.00g/cc<br>Spherical Bright Orange MicroBead Polymer Particles for Flow Visualization and PIV
Item #: UVPMS-BO-1.00 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.00 - View
Fluorescent Orange Polyethylene Microspheres Density 1.015g/cc<br>Bright Orange Polymer Spherical MicroBeads
Item #: UVPMS-BO-1.015 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.015 - View
Fluorescent Orange Polyethylene Microspheres Density 1.030g/cc<br>Spherical Polymer Particles Fluorescent in UV Light
Item #: UVPMS-BO-1.03 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.03 - View
Blue Polyethylene Microspheres Density of 1.00g/cc <br>Spherical Particles for Flow Visualization and PIV
Item #: BLPMS-1.00 -
Price: $103.95-$372.75
Item #: BLPMS-1.00 - View
Bright Blue Polymer Spherical MicroBeads. Spherical particles with density of 1.08g/ml are designed to match the density of white blood cells and enable analyzing, studying, and modeling the behavior of blood.
Item #: BLPMS-1.08 -
Price: $103.95-$372.75
Item #: BLPMS-1.08 - View
Barium Titanate Solid Glass Microspheres and Spheres
Item #: BTGMS -
Price: $52.50-$895.00
Item #: BTGMS - View

Barium Titanate glass spheres offer a higher Refractive Index (n) than most other glass formulations. Depending on the grade of material, reflecting index of Barium Titanate glass is between 1.9 to... [more info...]

Aluminum-Coated Solid Barium Titanate Glass Microspheres 4.2g/cc - 30-100um Diameter
Item #: BTGMS-Al -
Price: $131.25
Item #: BTGMS-Al - View

Physical Characteristics: Coating: Fully Aluminum Coated (~500nm thickness) Core: Solid Barium Titanate Glass Spheres Density: ~4.2g/cc Appearance: Grey powder [more info...]

Red Polyethylene Microspheres Density 1.070g/cc<br>Bright Red Polymer Spherical Microparticles
Item #: REDPMS-1.070 -
Price: $103.95-$131.25
Item #: REDPMS-1.070 - View
Red Polyethylene Microspheres Denstiy 1.080g/cc<br>Bright Red Polymer Spherical Microbeads
Item #: REDPMS-1.080 -
Price: $103.95
Item #: REDPMS-1.080 - View
Red Polyethylene Microspheres Density 1.065g/cc<br>Bright Red Polymer Spherical Microparticles
Item #: REDPMS-1.055-1.065 -
Price: $103.95
Item #: REDPMS-1.055-1.065 - View
Red Polyethylene Microspheres Density 1.09g/cc<br>Bright Red Polymer Spherical Microbeads
Item #: REDPMS-1.09-1.10 -
Price: $103.95
Item #: REDPMS-1.09-1.10 - View
Yttria Stabilized Zirconia Microspheres and Spheres 6g/cc - 45um to 1600um (1.6mm) yttrium stabilized zirconia powder, spherical powder, microspheres, microbeads, particles, density of 6.0g/cc
Item #: YSZ -
Price: $99.00-$197.50
Item #: YSZ - View

Yttria-stabilized zirconia microspheres and spheres (ZrO2 / Y2O3) are supplied as a dry powder. With operating temperatures up to 1000°C, a melting point of ~2700°C, and density of ~6g/cc, these... [more info...]

Conductive Silver Coated Poly(Methyl Methacrylate) Acrylic Microspheres
Item #: PMMA-AG -
Price: $99.00-$348.50
Item #: PMMA-AG - View

Sphericity varies by Product Code: PMMAMS-AG: These are highly spherical particles. Greater than 95% of particles are spherical. PMPMS-AG: Also highly spherical grade, with occasional minor... [more info...]

Red Luminescent, Ultraviolet Fluorescing Polymer Microspheres 1 - 5micron
Item #: FMR -
Price: $103.95
Item #: FMR - View

Product Features and Benefits: Inert fluorescent polymer, highly cross-linked for use in applications where the avoidance of swelling, bleeding, migration or plateout is desired.Highly Solvent... [more info...]

Green Luminescent, Ultraviolet Fluorescing Polymer Microspheres 1 - 5micron in diameter.
Item #: FMG -
Price: $103.95
Item #: FMG - View

Product Features and Benefits: Inert fluorescent polymer, highly cross-linked for use in applications where the avoidance of swelling, bleeding, migration or plateout is desired.Highly Solvent... [more info...]

Fluorescent Violet Polyethylene Microspheres<br>Density 1.00g/cc for Flow Visualization and PIV
Item #: UVPMS-BV-1.00 -
Price: $157.00-$372.75
Item #: UVPMS-BV-1.00 - View
Fluorescent Violet Polyethylene Microspheres<br>Density 1.06g/cc
Item #: UVPMS-BV-1.06 -
Price: $103.95-$131.25
Item #: UVPMS-BV-1.06 - View
Barium Sulfate White Polyethylene Polymer Microspheres - Particles for MRI or X-Ray Medical Applications - Density of 1.5g/cc
Item #: BSPMS -
Price: $157.00-$261.00
Item #: BSPMS - View

White barium sulfate polyethylene microspheres are supplied in dry powder form and are stable in solution. Polyethylene microspheres are hydrophobic and need to be coated with a surfactant prior to... [more info...]

Conductive Silver-Coated Glass Microspheres, Beads, Particles
Item #: SLGMS-AG -
Price: $103.95-$261.00
Item #: SLGMS-AG - View

Also see: Other Conductive Spheres: Conductive Silver Metal Coated Microspheres Other Soda Lime Spheres: Solid Soda Lime Glass Spheres and Microspheres ... [more info...]