material:sae52100 length:7mm diameter:6mm ends radious:0.8mm-1.00mm hardness:25-35HRC material:SAE52100SIZE:Name:Needle ... /-4,-3/-5, -4/-6, -5/-7,-6/-8, -7/-9, -8/-101h13G330/-3, -1.5/-4.5, -3/-6,-4.5/-7.5, -6/-9 ... , -7/-101.5G550/-5, -3/-8, -5/-102.5