The Ground Fault Circuit Breakers have two different UL ratings: UL 1077 for the standard current trip for supplemental circuit protection as well as UL 1053 the standard for Ground Fault trip current differential. They are 26 mm wide having a connection for the hot and the neutral wiring. Also comes with a toggle switch reset as well as a red flag trip indicator. They are rated 5 KA of interrupting Amps. They are UL recognized and Internationally approved.