CT16G4S24AM is a 16GB Dual Ranked DDR4 SODIMM module that operates at speeds up to 2400 MT/s and has a CL17 latency. It is an Unbuffered SODIMM. It conforms to the industry standard DDR4 SODIMM layout of 260 pins and is only compatible with 3. 5GHz model systems that take DDR4 2400MT/s SODIMM memory.
Crucial CT16G4S24AM 16gb Ddr4, Unbuffered, Non-ecc Sodimm For Mac Systems