Specification:Name: Sprockets Chain GearType: 04CMaterial: 304 Stainless SteelSurface Treatment: UntreatedPitch: 6.35mmTeeth Number: 40 TeethRound Bore: 8/10/12mmKeyway Bore:12mm(keyway 4x1.8mm)14mm(keyway 5x2.3mm)15mm(keyway 5x2.3mm)16mm(keyway 5x2.3mm)17mm(keyway 5x2.3mm)18mm(keyway 6x2.8mm)19mm(keyway 6x2.8mm)20mm(keyway 6x2.8mm)22mm(keyway 6x2.8mm)25mm(keyway 8x3.3mm)Application:For use with curler chainsNote:Due to diverse production batches, the scale (such as steps, whole height, height wire, etc.) could fluctuate slightly, please talk to the actual product.Package :Packing : Plastic bag / Carton box.Quantity : According on your Choose!