Capacity:8GB KIT (2 x 4GB) (1600MHz) 8GB KIT (2 x 4GB) SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz For Apple MacBook Pro Series. Designed For Apple MacBook Pro Series: 2.3GHz Intel Core i7 - (15-inch) (DDR3) (Mid 2012), 2.5GHz Intel Core i5 - (13-inch) (DDR3) (Mid-2012), 2.6GHz Intel Core i7 - (15-inch) (DDR3) (Mid-2012), 2.7GHz Intel Core i7 - (15-inch) (DDR3) (Mid-2012), 2.9GHz Intel Core i7 - (13-inch) (DDR3) (Mid-2012). Will also work with many other brands and models. Genuine A-Tech Brand: A-Tech is one of the most trusted names in Premium Memory. Backed by a Lifetime Warranty and 5 star customer support, A-Tech has you covered! Memory upgrades have never been easier. Designed specifically to help your computer run faster and smoother, an A-Tech memory upgrade is one of the fastest, most affordable, and easiest ways to improve system performance. A-Tech memory empowers your computer to achieve faster application loading times, faster system responsiveness, and increased ability to multitask and handle data-intensive programs. A-Tech modules are rigorously tested to ensure that your memory meets our stringent compatibility and performance standards. Every A-Tech ram module is tested for complete functionality before it leaves our doors and includes toll free technical support at 1-866-557-4527. Give your computer the best, trust A-Tech!