... composed of closed round rubber, with teeth and attached belt or pulley. When working, tee Synchronous BeltTypes:1) ... composed of closed round rubber, with teeth and attached belt or pulley. When working, teeth and trough are ... , and belt.3) High quality and long life.4) Used in machinery and equipment for sewing, food processing, offices ... , S14M, RP2M, RP3M, RP5M, RP8M, RP14M, etc. Synchronous Belt