Full Details on Amazon.com : http://www.amazon.com/gp/product/B001T9H27A?tag=tsukuyomi-20

Centon 4GBKITLT1066APL 4GB KIT PC3-8500 1066MT/S DDR3 SODIMM Memory Module

Centon s Mac memory upgrades are guaranteed to be compatible with your Mac
Centon s Mac memory backed by a lifetime warranty and free technical support
Centon is a member of the Apple Developer Program
Compatible Mac Systems-MacBook Pro -iMac