A 10mm OD precision ground and polished stirrer shaft with our patented** chem-stir blade attachment system. SHAFT (C) has been manufactured with a ring at the lower end to permit attachment of the blade (b) with a PTFE nut (D) and bolt (a). shaft is supplied complete with PTFE nut and bolt set. For use with PTFE bearings such as the cg-2077. Polished shaft will not cause abrasion to the sealing surfaces of the PTFE bearing, thereby allowing a vacuum tight seal. Uses the same PTFE nut and bolt blade attachment method as the cg-2074 ground shaft.