This is a MacBook 13" white keyboard / Top case assembly. On the 13" Macbook, the keyboard is integrated into the top case, and is not available separately as in other models. This part also includes the trackpad assembly. Note that there are two versions of this top case which are available as options below. The newer model Macbooks (Santa Rosa) have different symbols on some keys. Primarily the keys next to the spacebar do not have the Apple logo on them on the newer models. The top cases however are interchangeable between the models (except for the Unibody), and the only difference is the different style keys. The Penryn Unibody is the newer polycarbonate unibody style which does not include the trackpad.