Apple 923-0003 SVC,FOAM,ODD FLEX,PK/50 - 13inch-15inch MacBook Pro Early Late 2011 - A1278, A1286. 923-0003 for A1278 i5 2.3GHz Early 2011, A1278 i7 2.7GHz Early 2011, A1286 i7 2.0GHz Early 2011, A1286 i7 2.2GHz Early 2011, A1286 i7 2.3GHz Early 2011, A1286 i7 2.2GHz Late 2011, A1286 i7 2.4GHz Late 2011, A1286 i7 2.5GHz Late 2011, A1278 i5 2.4GHz Late 2011, A1278 i7 2.8GHz Late 2011. Apple Case Components for MacBook Pro (13-inch Early 2011), MacBook Pro (15-inch Early 2011), MacBook Pro (15-inch Late 2011), MacBook Pro (13-inch Late 2011).