... , 20gg,25gg, 30gg, 32gg, 36gg, 38gg, 40gg, 42gg 15*18*40*3 C222 GF3037gauge working part , TriangularGauge Shank. 15 (shank diameter in ... Millimeter is 1.83)gauge intermediate section,18 (intermediate section ... )Barb Distance (in mm), C ( Barb Distance in Millimeter is 3.18)No. of barbs on first edge, 2No. of barbs on ...