... of II, III type are made of HT200. Normally, V slots I, II, III type are supplied in pairs. It' ... Bottom Surface Parallelism Between V Slot and Side Surface Symmetry Between V Slot and End Surface Perpendicularity between V slot and end surface ... 40 60 300 × 300 × 120 10 12 30 40 Magnetic V-block 80 × 60 × 75 1.5 2 3 2.5 ...