elastic steel ER Collet 1.Material: 60Mn 2.Accuracy:0.005mm 3.Power ... , tapping, grinding and engraving operation etc.5.Models: ER8, ER11,ER16,ER20,ER25,ER32,ER40,ER50.6.Packing: inner packing ... suplly various machinery accessories such as Er collet, Sealed collet, Tap collet, R8 collet, 5C dollet, OZ collet, tool holder etc.If you need ... to contact us.skype id: rosewicker elastic steel ER Collet