Safe-Lab Hollow Teflon PTFE StopperFor 24/40 Tapered Joints, pack of 2Use these hollow Teflon® PTFE stoppers for boiling and distilling flasks with ground joints.Easily removed from standard tapered glassware by turning the red extraction nut to apply a safe, gentle and even force against the mouth ..
Safe-Lab Stirrer BearingFor 24/40 Tapered Joints with Stopper-Loc Nut, PTFEStopper-Loc™ Nut allows stirrer bearing to be locked to outer ground joint when stirring viscous materials for long periods of time.Complete with Stopper-Loc™ Nut and two Teflon® PTFE insertsReplacement Teflon® PTFE insert wi..
Safe-Lab Stirrer BearingFor 29/42 Tapered Joints with Stopper-Loc Nut, PTFEStopper-Loc™ Nut allows stirrer bearing to be locked to outer ground joint when stirring viscous materials for long periods of time.Complete with Stopper-Loc™ Nut and two Teflon® PTFE insertsReplacement Teflon® PTFE insert wi..