<b>Specification: </b> <br />Model: ER11 1/8" & ER11 1/4" <br />Material: High Grade 65Mn Spring Steel <br />Outside diameter: 0.45" (11mm) <br />Precision:<0.012 <br />Height: 0.69" / 0.68" <br /><br /><b>Package included:</b> <br />2 Pcs CNC ER11 Collet