New XK3W Knob XK3W(40) M8, AISI 316, Blue NBR 1020723 Height:25.00 mm (0.98")|Knob size:40.00 mm (1.57")|Material:AISI 316|Net weight:58.00 g (0.13 lbs)|Sealing material:Blue NBR|Thread size:M8|Thread standard:Metric C View