Clamping inserts for BASIC 250 and BASIC 315 butt welding machines, designed for butt welding HDPE, PP, PVDF pipes with an external diameter of 180 mm. For the BASIC 315 machine, these inserts must be mounted together with the 315 x 250 adapter insert set, code 55031500250. Please specify the welding machine’s serial number before ordering the inserts.