Transmission Belt Pulley S2M-42T Aluminum Alloy 5/8/10/12mm Bore S2M 42Teeth Synchronous Wheel 7mm/11mm Belt Width Timing PulleyName:S2M Timing PulleySize:S2M-42TType:BF typeMaterial:Aluminum AlloyWidth:7mm/11mmTeeth Number:42TeethTeeth Pitch:2mmPackage:1pc Timing PulleyRemark:*Inner Bore Dia. allowable tolerance:plus(0~0.03mm)*Total Height/Flange Dia./Teeth Outside Dia./Screw size enable little tolerance between each various batch.