Zinc Plated Double Pitch Sprocket with Keyway and Screw Eav131 Xinghua Donghua Gear Co., Ltd. Base Info Model NO.:sprocketUsage:Transportation ChainSize:as Your DrawingStructure (For Chain):Roller ChainTrademark:DONGHUASpecification:CEOrigin:Xinghua, China Description Pre:Top Quality LED Monitor Desk Mount Bracket Next:Mini Moto 47cc 49cc Drive System 108 Links Loops Chain with Gear Box and Rear Sprocket Fit Mini Moto Pocket