... raw material 2. Precision machining, Strict inspection 3.non-standard, OEM Timing Pulleys 1, A professional manufacturer ... quality raw material, Precision machining, Strict inspection.2. non-standard, OEM. We supply timing pulley following series:H ... ,XH,XXH;L,XL,MXL;T2,5,T5,T10,T20;3M,5M,8M,14M Black ... price, timely delivery and great customer service. Non-standard Metal Timing Pulleys