Meyer Metric Pin Gage Set 23.74mm - 25.40mm, M8MMP M8MMMMeyer Class Z Metric Pin Gage Set Meyer's Class Z Gage Pin Sets are now made to a closer tolerance (0. 0025mm), are more accurate, and are a better solution for your needs. The old Class ZZ had a size deviation of 0. 005mm. The new Class Z has a size deviation of 0. 0025mm. Features of this set include 23. 74mm to 25. 40mm Class Z Gage Pin Set 84 Pieces in . 02mm increments 51mm Overall Length Sets are traceable to NIST Boxes and Gages are both marked