Apple Computer, MacBook Pro 13-inch 2.26/2.53 GHz Core 2 Due (P7550, P8700), Apple Order Number, MB990LL/A, MB991LL/A, Model Number, A1278, Model Year, Mid 2009, Part Name, 1GB DDR3 SDRAM 1066 SO-DIMM, Manufacture Part Number, N/A, Compatible Apple Order Number, MB990LL/A, MB991LL/A, Compatible Model Number, A1278, EMC Number, EMC 2326, EEE Code, N/A, Compatible Apple Computer Family, MacBook Pro (13-inch, Mid 2009)
Order you product here: 661-5225 1GB DDR3 SDRAM 1066 SO-DIMM for Macbook Pro 13-inch Mid 2009 A1278 MB990LL/A MB991LL/A, 661-5225
source http://info.applepartsellers.com/661-5225-1gb-ddr3-sdram-1066-so-dimm-for-macbook-pro-13-inch-mid-2009-a1278-mb990ll-a-mb991ll-a