Check the listing for details. 8GB (2x 4GB) Apple MacBook Pro 13"/15" Early 2011 / Late 2011 DDR3 Laptop Memory. Condition: New. Listed at 18.95 USD. The Apple MacBook Pro model shown in the title is 100% compatible with this matching pair of new 4GB DDR3 memory modules. We ship extremely fast - never later than the next business day. It will get to you quickly and is guaranteed to work flawlessly when installed. You can count on it! Our memory modules are guaranteed to work and we offer a lifetime warranty exchange against manufacturing defects. We also accept returns in original condition within 60 days of delivery for a full refund less shipping charges. Installation assistance and technical support by email or telephone is available free of charge. Please note: We cannot always ship the exact module pictured since it may not be in our inventory at the time it's sold. You may receive Samsung, Micron, Hynix, Nanya, Kdata, Kingston, Elpida or Crucial among others. If you prefer a particular brand please let us know before you buy in order to confirm availability.