TAPPO USCITA bombola gas con filettatura sinistra M21.8 stoccaggio stop perdita reggiseni metallo
OPTION 1: M21.8 (W21.8) Left Hand thread. Thread Brass Pipe Screw Hex Female Blanking Plug Tube End Cap. OPTION 2: 3/8" Left Hand thread. (You are buying one plug, two shown for illustration purposes).