16GB 2 X 8GB Memory for iMac 27" inch 3.2GHz Quad Core Intel Core i5 Late 2013 ME088LL/A 1600MHz DDR3 (PC3-12800) SO-DIMMs RAM (PARTS-QUICK BRAND) Halogen Free; ROHS Speed: PC3 12800 1600MHz Form Factor: 204 pin SODIMM Capacity: 16GB 2X8GB KIT Warranty: Lifetime