If you are unsure of which keyboard you have please click here. These parts are the individual scissors mechanisms (white plastic keyboard parts that are found under the keycaps) for the Aluminum PowerBook G4 and MacBook Pro. Small scissors are $2.00. Medium (Caps Lock, Tab, Delete, Shift, and Return) are $5. Please Note: These scissors are not compatible with some versions of 12-inch Aluminum PowerBook or any of the the 13-inch MacBooks.