Complete, unenclosed, molded case breaker with non interchangeable trip. Takes the place of 2 single pole breakers in 1 of space. Wire range: CU fron #14 to # 8, AI from #12 to #6. Will replace American Switch, Westinghouse Type BR, Bryant, Challenger, Sylvania, Crouse Hinds, Murray, Frank Adams, General Electric full size only , General Switch, I T E, Gould, Montgomery Ward and Sears. HACR rated. 120/240 volt AC 10,000 AIR.