If you are unsure of which keyboard you have please click here. These parts are the individual scissor mechanisms for the Aluminum PowerBook G4 and MacBook Pro. These are the white plastic keyboard parts that are found under the keycaps. Small scissors are $5.00. Medium (Caps Lock, Tab, Delete, Shift, and Return) are $10. Please Note: These scissors are not compatible with some of 12-inch Aluminum PowerBooks and the 13-inch MacBook.