ELF 16mm sound projector Drive BELT SET. 1 x MOTOR DRIVE. ALSO NT-0; NT-1; NT-2; NT-3 WITH ROUND BELTS. 1 x REWIND DRIVE. R MODELS: RT-0; RT-1; RT-2; RT-3; RM-1; RM-2; RM-3. SUPERIOR QUALITY TOUGHEST NITRILE RUBBER DRIVEBELT SET.