... /50HZ torque:55NM CCC, CE, ROHS, UL AC 55Nm tubular motor for roller door CCC, CE, ROHS, ULStandand type Quiet& ... Noise Mechanic Limit+Manual,external motor with four wires Tubular motors are designed by international advanced technology, with ... door etc.Compared with outside motor,it is less excluded volume,more fit for roller shutter window and door. electrical ac tubular motor