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