... certification5. has the barb: 1 barb, 2 barbs, 3 barbs on each edge6. has working blade: 25gg, ... 30gg, 32gg, 36gg, 38gg, 40gg, 42gg 15*18*40*3 C222 GF3037gauge working part , TriangularGauge Shank. 15 (shank diameter ... in Millimeter is 1.2)Gauge Working Part, 40 (triangular blade height in Millimeter is 0.48) ... Nominal Length (in inch), 3 ( needle total length in Millimeter is 76.2 ...