16GB Kit (8GBx2) DDR3/DDR3L-1600 MHz (PC3-12800) CL11 204-Pin SODIMM Memory for MacBook Pro (13-inch & 15-inch, Mid 2012) Fully tested to insure compatibility with your Mac Increases system performance DDR3 Low Voltage / DDR3L DRAM NON ECC / Unbuffered Limited Lifetime Warranty