... certification5. has the barb: 1 barb, 2 barbs, 3 barbs on each edge6. has working blade: 25gg, 20gg ... , 30gg, 32gg, 36gg, 38gg, 40gg, 42gg 15*18*36*3.5 R222 GF3037gauge working part , TriangularGauge Shank, 15 (shank ... in Millimeter is 0.57)Nominal Length (in inch), 3 .5 ( needle total length in Millimeter is 89 ... in mm), R ( Barb Distance in Millimeter is 6.36 )No. of barbs on first edge, 2No. of barbs ...