This is a bottom case assembly for the MacBook 13". This is a Black bottom case. There are two versions of this bottom case. 922-7592/922-8132 is for the original core Duo and Core 2 Duo Macbooks that have the apple symbol on the command key (the key next to the spacebar.) 922-8286 is for the Santa Rosa and Penryn Macbooks that do not have the apple symbol on the command key.