For hand or motor operation

Borosilicate glass construction. The pestle is tooled for a single hole rubber stopper. By inserting one end of a short metal rod in the stopper, these grinders can be motor driven at slow speeds by inserting the other end of the metal rod into the motor chuck. Tubes and pestles are interchangeable, with a uniform 0.10–0.15mm (0.004–0.006") clearance. For special clearance pestles, contact your VWR® sales representative. Supplied without rubber stoppers and metal rods.