All-glass construction

·         Popular style which affords the choice of hand or motor operation

·         Pestle is tooled for an appropriately sized single-hole rubber stopper (not supplied)

·         These grinders can be motor-driven at slow speeds by inserting one end of a short metal rod in the stopper and inserting the other end into the motor chuck

·         Replacement components are available and completely interchangeable

·         Clearance between pestles and tubes is 0.004” to 0.006”

·         Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements