23 PCS PRECISION ER40 Metric COLLETS PER SET -------4mmTHRU 26mm BY 1mm step. INCLUDING ONE OF EACH: 4,5 6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26mm. We also have the following sizes in stock. The item "23pcs ER40 metric collet set, collets 4mm 26mm, 0.008mm TIR #ER40-SET23M-NEW" is in sale since Saturday, January 5, 2019.This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\CAT Holders". The seller is "niuniucme" and is located in Madison Heights, Michigan. This item can be shipped worldwide.