This 1mL Dounce Tissue Grinder is designed to retain a high percentage of cell nuclei, mitochondria, and proteins in soft tissues or cell suspensions, and is ideal for enzyme studies. It is precision manufactured from Wheaton-33 low extractable borosilicate glass, and the mortar features a large reservoir and pouring lip. It is supplied with one loose pestle with a 0.114mm clearance and one tight pestle with a 0.05mm clearance. The sample covers the pestle ball, preventing heat buildup by reducing friction against the mortar. Material: Borosilicate Glass. Tube OD x Length: 11 x 48mm. Overall Length: 125mm. Loose Pestle Clearance: 0.114 +/-0.025mm. Tight Pestle Clearance: 0.05 +/- 0.025mm. Capacity: 1mL. Wheaton #: 357538.