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: 0.0028-0.0047 in. Pestle B clearance: 0.0008-0.0022 in. Working volume × L: 7 mL × 125 mm