16GB kit consisting of 2 8GB DDR3L 1.35V Notebook module that operates at speeds up to 1866 MT/s & has a CL13 latency. It is dual voltage & can operate at 1.35V & 1.5V. It is Unbuffered & is non-ECC. It conforms to the industry standard SODIMM layout of 204 pins & is compatible with computers that take DDR3L SODIMM memory. Specifically geared towards mac systems. ** For Apple Mac Pro (Late 2013)**