Corsair SODIMM DDR3,CL9,1333-4GB

SODIMM DDR3,CL9,1333-4GB for iMac, MacBook, MacBook Pro
CORSAIR Mac Memory, 4GB 1333MHz C9 DDR3 SODIMM for Apple iMac, MacBook and MacBook Pro 4GB (1x4GB). Tested at Apples compatibility lab to ensure functionality with all current products that have official Apple support for 4GB SO-DIMMs. Adding system memory is one of the most effective ways to improve overall performance and Corsair’s Mac Memory offers a solid tested solution with a limited lifetime warranty.