2pcs of 2 GB PC2-6400 DDR2-800 200pin SODIMM. Manufactured By Samsung 30 day money back guarantee Lifetime warranty for exchange Compatible with: Apple iMac "Core 2 Duo" 2.8 24-Inch (Early 2008) Early 2008 - MB325LL/A - iMac8,1 - A1225 - 2211 Max Memory 6GB by using 1 x 4gb and 1 x 2gb. Sockets 2