CoreParts DDR3 4GB memory module 2 x 2 GB 1066 MHz

Compatible with: - Apple iMac: 20" (Early 2009), 21.5" (Late 2009), 27" (Late 2009) - Apple MacBook Pro: 13" (Mid 2009), 13" (Mid 2010), 15" (2.53GHz, Mid 2009), 15" (Late 2008), 15" (Mid 2010), 17" (Early 2009), 17" (Mid 2009), 17" (Mid 2010)