Fitting made of PTFE, for transition from ground joints to GL threads. For connection of hard-walled tubing (e.g. PTFE, PFA, FEP) with BOLA Laboratory Screw Joints . Ground joint body with turned rings and knurled grip for opening. The product is only exposed to PTFE. Cone size NS 29/32, Bore dia. mm 12,5, Thread GL 25