SAFE-LAB, STIRRER BEARING, PP/TEFLON, WITH STOPER-LOC-NUT, 29/42 SAF-T-LINE threaded size for use with Stopper-Loc Nut. Allows stirrer bearing to be locked to outer ground joint when stirring viscous materials for long periods of time. Sold complete with Stopper-Loc nut and two Teflon inserts.
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