4GB Kit (2 X 2GB) Early 2008 Macbook Pro 15" 2.4 GHz Intel Core 2 Duo Memory RAM Upgrade (PARTS-QUICK BRAND) Capacity: 4GB Kit ( 2 X 2GB) Form Factor: 200 pin SO-DIMM Speed: PC2-5300 667 MHz Halogen Free; ROHS Compliant; Warranty : Lifetime