Synchronous Belt Our timing belts are composed of closed round rubber, with teeth and attached belt or pulley. When working, tee Synchronous BeltTypes ... , reinforced fiber, cloth2)Our timing belts are composed of closed round rubber, with teeth and attached belt or pulley. When working, teeth ... electrical appliances.T type:MXL, XL, L, H, XH, XXH, T2.5, T5, T10, T20, AT5, AT10, AT20, etc. Arc tooth:3M ...