HSS fine pitch gear hob Fine Pitch Topping Hobs can be ordered by customers . Size: (mm) Module Outside Dia.Overall LengthHole Dia.0.10251080.120.150.200.250.30150.350.400.500.600.70250.800.303215130.350.400.500.60200.700.800.901.00 inch size also can be manufactured .