New XKG Knob XKG(40) M8 x 16, AISI 316, Blue NBR 1020590 Height:25.00 mm (0.98")|Knob size:40.00 mm (1.57")|Material:AISI 316|Net weight:100.00 g (0.22 lbs)|Sealing material:Blue NBR|Thread size:M8|Thread standard:Metric C View