... 3.Exported for years 4.ISO9001-2008 certified 5. OEM Reach Jiayuan synchronous pulley: 1.Straight-bore: MXL,XL,L,H,T2 ... .Taper-bore: L,H,XH,5M,8M,14M;3.Timing pulley bar: MXL,XL,L,T2.5,T5,T10,AT5,AT10 ... maintainance;4. lowest radial load on it's support synchronous pulley