Freeze and Process tiny tissue samples within a microcentrifuge tube. Stainless steel mortar has a welded fixture to hold a 1.5ml microcentrifuge tube. The mortar is suspended above a stainless steel cavity which holds the liquid nitrogen and is nested in a heavily insulated blue polyethylene housing. Permits grinding of smaller amounts of tissue right in a 1.5ml microcentrifuge tube resulting in reduced sample loss and collection time. Prevents tube from cracking by eliminating direct contact with liquid nitrogen. Includes 5" long stainless steel pestle with 10.2cmW (4") x 1.9cmD (¾") polyethylene handle. Housing overall dimensions: 16.5cmD (6½ ")x 11.4cmH (4½"); suction feet keep it stable on the workbench. Removable, insulated mortar handle, 10.2cmL (4").