... Timing pulley, steel timing pulley,steel timing belt pulley, belt pulley,mxl timing pulley, t2.5 timing ... belt tensioner pulleys,double-sided timing belt,oem timing pulley,timing belt tensioner, timing tensioner, small timing belt pulley,timing belt pulley conveyor belt ... alloy frequently used,brass and nylon available.7. Surface treatment:black oxdizing,phosphating,anodize,zinc-plating8. Tolerance: ...