Gear, Spur Gear, Gear Shaft manufacturer / supplier in China, offering Standar and Nonstandard Optional Steel CNC Big Small Gear Counterweight Timing Active Sprocket, Factory Price Customized Aluminum Htd3m 5m 8m Synchronous Timing Pulley Synchronous Pulley, OEM Customized High-Precision Small Module 2m 3m 5m 8m Timing Pulley Synchronous Pulley and so on.