... ER-50 COLLETSpot: Standard PartsMaterial: 60Si2MnSpecifications: 1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0,10Hardness: 48-55 HRCAccuracy: within a wire ... .51.20.5ER111.0-7.01111.59.5183.82.520.5ER161.0-2.0161713.827.56.2642.70.5>2.0-10.01ER201.0-2.5202117.431.56 ... .364.82.80.5>2.5-13.01ER251.0-2.5252622346.6653.10.5>2.5-16.01ER322.0-2 ...