Grind frozen samples without liquid nitrogen hazards. Frozen tissue samples can be ground without the hazard of liquid nitrogen droplets flying onto personnel. A 304 stainless steel mortar is suspended by three brackets above a stainless steel bowl which holds the liquid nitrogen. The bowl is nested in a heavily insulated blue polyethylene housing. The mortar has an insulated handle, 102mm (4") long, that is removable for saving space. The housing measures 165mm (6 1/2") in diameter x 114mm (4 1/2") high and has three suction cup feet. The recommended size pestle is any size appropriate for a 275mL mortar. Pestle not included.