Item Condition: New genuine 

Compatibility:MacBook Pro 13” A1278

MacBookPro5,5 Mid 2009: MB990LL/A (2.26 GHz Core 2 Duo)
MacBookPro5,5 Mid 2009: MB991LL/A (2.53 GHz Core 2 Duo)
MacBookPro7,1 Mid 2010: MC374LL/A (2.4 GHz Core 2 Duo)
MacBookPro7,1 Mid 2010: MC375LL/A (2.66 GHz Core 2 Duo)
MacBookPro8,1 Early 2011: MC700LL/A (2.3 GHz Core i5)
MacBookPro8,1 Early 2011: MC724LL/A (2.7 GHz Core i7)
MacBookPro8,1 Late 2011: MD313LL/A (2.4 GHz Core i5)
MacBookPro8,1 Late 2011: MD314LL/A (2.8 GHz Core i7)
MacBookPro9,2 Mid 2012: MD101LL/A (2.5 GHz Core i5)
MacBookPro9,2 Mid 2012: MD102LL/A (2.9 GHz Core i7

Identifying Numbers:
Apple Part #: 922-9063, 922-9525, 922-9773
Printed Part #: 821-0831-A, 821-1254-A