The KIMBLE Dounce Tissue Grinder Set manufactured by DWK Life Sciences contains one large clearance pestle for the initial sample reduction and one small clearance pestle\ for the final homogenate.
Specification
Material: Glass Pestle A clearance: 0.0035-0.0065 in. Pestle B clearance: 0.0010-0.0030 in. Working volume × L: 15 mL × 157 mm