... are 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 in ... one movement will cause transmission of teeth, chain, and belt.3) High quality and long life.4) Used in ... S8M, S14M, RP2M, RP3M, RP5M, RP8M, RP14M, etc. Synchronous Belt