12MM Belt Width; 8MM Belt Pitch; 8M-12 Poly Chain GT2 Belt Style; 25 Teeth; 14.478MM Face Width; Rough Bore; 73.914MM Flange OD; 62.052MM OD; 63.652MM Pitch Diam; No Keyway; No Bushing; Minimum Plain Bore; 1.5" Max Bore