Knight 16GB KIT DDR3 1600 MHz PC3 12800 (2X8GB) SODIMM for Apple MacBook Pro 2012 models Capacity: 16GB Kit, 2X8GB Speed: PC3-12800, DDR3 1600MHz; Form Factor: 204 pin, Sodimm for PC Laptop, Apple MacBook Pro and iMac Non ECC, Non Registered, Dual Channel support, Fully tested Warranty: Manufacturer Limited Lifetime Free Shipping (USPS First Class Mail with delivery confirmation #)