We supply timing pulleys following series: 1) Timing pulleys:XL,L,H,XH,XXH 2) HTP Timing pulleys:3M,5M,8M,14M,20M 3) T/AT Timing pulleys:T2.5,T5,T10,T20,AT5,AT10 2. Material used for pulleys:Aluminum,Steel,gray iron 3. The surface treatment is black phosphated (except Al ),the pulleys that made of gray iron should be dynamically balanced. 4. We can also produce pulleys even size are not in the form 5. OEM/ODM service offered