Memory Module 8GB 1066MHz DDR3 (PC3-8500) - 2X4GB SO-DIMMs RAM for Apple MacBook Pro 15" inch Core i5 i7 (Mid 2010) Third Party Equivalent to MC016G/A, MC557G/A (PARTS-QUICK BRAND) Halogen Free; ROHS Speed: PC3 8500 1066MHz Form Factor: 204 pin SODIMM Capacity: 8GB 2X4GB KIT Warranty: Lifetime