Compatible with the following laptop models: MacBook Pro 13-inch 2009 Version (A1278, MB990LL/A, MB991LL/A), MacBook Pro 13-inch 2010 Version (A1278, MC374LL/A, MC375LL/A), MacBook Pro 13-inch mid-2011 Version (A1278, MC700LL/A, MC724LL/A), MacBook Pro 13-inch late-2011 Version (MD313LL/A, MD314LL/A), MacBook Pro 13-inch 2012 Version (A1278, MD101LL/A, MD102LL/A). Compatible with original/OEM part numbers: 661-5229, 661-5557, A1322.