Highly efficient, all glass, tapered tissue grinder combining two grinding surfaces on a single pestle and tube. The conical area is for initial grinding and the cylindrical area for final homogenization. Interchangeably ground to 0.1 - 0.15mm clearance. With pouring lip. The 10 mm rod on the three larger size pestles may be used with the 8124-10 Flex-Grip Chuck. The 6mm rod on the small size is for use with the 8124-05 chuck. Capacities represent volumes with pestle inserted.