Eaton Type BR 20 Amp 1 Pole Dual Function AFCI GFCI Circuit Breaker Garage door opener keypads Finished opening width is suggested Maple Stair Nose Finished opening width is suggested to be 4 in An automotive D bulb seal and built in rain gutter keeps weather out and each box has a black powder coat finish for maximum corrosion resistance Specification Details Series Name Type BR Type Dual function AFCI GFCI Amperage 20 amp Poles 1 pole Voltage 120 V Phase Single phase (120 240) Width 3 in Ground Fault Protection Self test Interrupting Rating 10 Dual Protection: Combines AFCI and GFCI to protect against arc and ground faults across the entire circuit