!±8± BioSpec 11079105z Zirconia/Silica Bead, 0.5 mm Diameter
Zirconia/Silica has a density of 3.7g/cc. 50 Percent more dense than glass. Good for spores and most tissues. Most bead media is reusable. Wash with lab detergent (not acid) and rinse well. Bead is sold in one pound bottle. 0.5 mm Diameter.