Bus Connection Hardware for CCB/AV1 Panelboards. Mounts Two (2) J600 Frame Circuit Breakers, 600A Max -Kit # TJK6K replaces OEM TJ6DPK. All kits come complete with detailed safety and installation instructions and include all necessary screws, brackets, and a deadfront cover plate. If additional 17" wide blank filler plates are needed see BFPCCB1, BFPCCB2 and BFPCCB3.