... .Metric Pitch/English pitch 4.ISO9001 200 Reach Jiayuan Timing Belt Pulley 1.Straight-bore: MXL,XL,L,H,T2.5,T5 ... .Taper-bore: L,H,XH,5M,8M,14M;3.Timing pulley bar: MXL,XL,L,T2.5,T5,T10,AT5,AT10 ... :1. Have been supplying to big players in this industry for years2. Lowest price based on large scale production3. ISO9001-2008 ... maintainance;4. lowest radial load on it's support Timing Belt Pulley