The Centrifu-Grinder vessels are designed for larger volumes than our "Preci-Grind" and "Econo-Grind" lines. Like the Preci-Grind systems, these Centrifu-Grinders have threaded necks with polypropylene screw caps. The pestle fits through a drilled cap and an un-drilled cap is provided for storage of the vial and its contents. The drilled cap limits sample contamination and loss as well as reducing aerosol contamination. The vessel can be centrifuged and permits homogenization and centrifugation in the same vial, reducing processing and transfer losses. The units are constructed of chemically inert borosilicate glass. Available in three sizes packaged 3 per box, or as an assortment packaged 1 of each size