A surgical kit is disclosed. The kit comprises a surgical instrument (100a, 100b), a loading unit (200), and a plurality of cartridge members (518a-518c). The surgical instrument includes a handle assembly (13, 134), and an elongated portion (120) extending distally from the handle assembly and defining a longitudinal axis. The loading unit is configured for selective engagement with a distal portion of the elongated portion. The loading unit including an anvil assembly (506) and a cartridge channel (508). Each cartridge member includes a plurality of retention slots with at least some of the slots including fasteners therein. Each cartridge member is configured for selective mechanical engagement with the cartridge channel, and includes a longitudinal length and a working length. The working length (WL) is the longitudinal distance along retention slots having fasteners therein. The longitudinal length (L) of each cartridge member is substantially the same, and the working length of at least two of the plurality of cartridge members is different.
