New for Lenovo IBM Thinkpad P50 P51 (Not compatible P50s P51s) Series laptop Keyboard ---- black ------- US layout -------- with backlit ! ! -------- 4 Screw stud version-------- Note : can't compatible IBM P50s P51s series laptop , P50 P51 and P50s P51s are differeent ! please double check our described and photo!!!