ER-16 COLLET 1.Spot: Standard Parts 2.Model: ER16 .Material: 60Si2Mn ER-16 COLLETER-16Spot: Standard PartsMaterial: 60Si2MnSpecifications: 1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0,10Hardness: 50HRCAccuracy: within a wire (also available within the eight high-precision ER collet U)CNC machine tools for machine tools, CNC machine tools FM ER collet