Our belt pulley are high quality and most competitive especially in European market. We have many years experience in exporting. Metric System: A. T-type series(T2.5,T5,T10,T20) B. HTD type:3M,5M,8M,14M C. STPD/STS type(S2M,S3M,S4.5M,S5M,S8M,S14M) The British System:MXL,XL,L,H,XMaterial:Plastic (1045 carbon steel, aluminum alloy frequently used,brass and nylon are also available.)Surface treatment:black oxdizing,phosphating,anodize,zinc-platingTolerance:conform to customers requirementOEM/ODM service:offeredDelivery: Prompt delivery