... ProductsAll kinds of gears (spur gear, bevel gear, sprial gear, ring gear, internal gear, sprocket, chain wheel) transmission, gear box, reducer ,shaft ... to decrease noise and increase load capacity.MaterialCarbon Steel , alloy steel , stainless steel , aluminum alloy , zinc alloy , brass ... precision on teeth of gear.CertificateISO9001:2000Minimum quantityAccept trial order 20CrMnTi steel spur gear