Vertex Parallel Set 18Pc. Hardness HRC48-52. Accuracy 0.01mm. Pairs of 5x16x100mm, 6x18x100mm, 8x24x100mm, 10x30x100mm, 12x36x150mm, 14x48x150mm, 18x60x150mm, 22x62x150mm plus step clamp 15x31x2.5x200mm.