... barbs, 3 barbs on each edge6. has working blade: 25gg, 20gg,25gg, 30gg, 32gg, 36gg, 38gg, 40gg, 42gg 15*18*36*3.5 R222 ... height in Millimeter is 0.57)Nominal Length (in inch), 3 .5 ( needle total length in Millimeter is 89 )Barb Distance (in ... 6.36 )No. of barbs on first edge, 2No. of barbs on 2nd edge, 2No. of barbs on 3rd edge, 2 triangular felting ...