... 3.5", 4", 4.5", and 6", 8", 10",CASE MATERIAL:Steel case, steel black case, steel chrome ... Grade A (2-1-2%)OPTIONS&ACCESSORIES:Custom dial, metric scale, DIN 2.5%,1% accuracy, recalibrators,restrictors, ... 3.5", 4", 4.5", and 6", 8", 10",CASE MATERIAL:Steel case, steel black case, steel chrome ... Grade A (2-1-2%)OPTIONS&ACCESSORIES:Custom dial, metric scale, DIN 2.5%,1% accuracy, recalibrators,restrictors, ...