ER Collets 1.Material: 60Mn 2.Accuracy:0.005mm 3.Power clamping ability 4.Hardness:HRC44-48 Products Features:ER Collet1 ... and engraving operation etc.5.Models: ER8, ER11,ER16,ER20,ER25,ER32,ER40,ER50.6.Packing: inner packing is ... China. We can suplly various machinery accessories such as Er collet, Sealed collet, Tap collet, R8 collet, 5C ... please kindly feel free to contact us. ER Collets Manufacture