... all kinds of gears(spur gear,bevel gear,sprial gear,internal gear,sprocket,chain wheel)transmission,reducer,shaft and sleeve etc ... of gears (spur gear, bevel gear, sprial gear, ring gear, internal gear, sprocket, chain wheel) transmission, gear box, reducer ,shaft and ... teeth of gear.CertificateISO9001:2000Minimum quantityAccept trial order 40Cr worm drive shafts