EATON CUTLER HAMMER IPB34 K&J Frame Interphase Barrier Kit 4222B10G02 Type KD Type JD IPB3 4222B10G02. This kit will work in place of IPB3 . 3 pole or 4 pole K frame and J frame circuit breakers . Type JD HJD JDC E2J E2JM KD HKD KKD-DC E2K E2KM . You get three barriers with this IPB34 kit . Instead of the two you get with the IPB3 .