Specification:Name: Timing Pulley with StepMaterial: Aluminum alloy (The edge is electrified iron)Type: BF TypeModel: 5M (HTD5M)Teeth Pitch: 5mmTeeth Number: 75 TeethBore: 10/12/14/15/17/19mm (Round Hole)Bore: 10mm(keyway 3mm),10/12mm(keyway 4mm),14/15/17mm(keyway 5mm),19mm(keyway 6mm) (Key Hole)Slot Width: 16/21mm (suitable for timing belt width 15/20mm)Bore Tolerance: 0.01-0.02mmApplication:Suitable for transmission componentsNote:Due to assorted batches, the dimensions of the timing wheel flange will be 2-3mm different, for the installation of enough area does not impact the use of equipment, the specific object shall prevail.Package:Packing : Plastic bag / Carton box.Quantity : According to your Choose!