Spectra™ Plug-in circuit breaker mounting module. Double branch mounting arrangement. 250 A maximum breaker current. SFHA, SFLA or SFPA breaker frame. 3X height. 31, 36, 40 and 44 inch box width range. Use to mount main or branch circuit breakers into panelboard. Breakers bolt on to the mounting modules. FP suffix indicates that all AFP filler plates with cut-outs for handles, are included to fit all applicable box widths. On double branch modules, filler plates to cover any unused breaker-pole are also included. Circuit breakers not included in module. Includes all necessary hardware.