Patriot Memory Signature Apple Line 16GB (2 x 8GB) DDR3 1600 (PC3 12800) ECC Unbuffered Memory for Apple Model PSA316G1600SK Type: 204-Pin DDR3 SO-DIMM Compatibility: For Apple MacBook, MacBook Pro & iMac Cas Latency: 11 Voltage: 1.35V Multi-channel Kit: Dual Channel kit Specifications: Dimension: 2.7 x 1.2 x 0.12