Specification:Name: Black 45# Steel HTD3M Timing Pulley Synchronous WheelMaterial: 45# Steel Surface Treatment: Blackening and Anti-rust TreatmentType: AF TypeTeeth Pitch: 3mmTooth Shape: Arc ToothTeeth Number: forty forty four 48 TeethRound Bore: 5/6/6.35/8/10/12/12.7/14/15/16/17/18/19/20/24/25/28mmKeyway Bore:8mm-keyway 3mm10mm-keyway 3mm10mm-keyway 4mm12mm-keyway 4mm12.7mm-keyway 5mm14mm-keyway 5mm15mm-keyway 5mm16mm-keyway 5mm17mm-keyway 5mm18mm-keyway 6mm19mm-keyway 6mm20mm-keyway 6mm22mm-keyway 6mm24mm-keyway 8mm25mm-keyway 8mm28mm-keyway 8mmSlot Width: 11/16mm (suitable for timing belt width 10/15mm)Bore Tolerance: 0.01-0.02mmApplication:Suitable for transmission componentsNote:Due to diversified batches, the dimensions of the timing wheel flange might be 2-3mm different, for the installation of ample space does not influence the use of equipment, the categorical object shall prevail.Package:Packing : Plastic bag / Carton box.Quantity : According to your Choose!