Kingston Technology 2 GB Memory for Select Apple Imac's Single (Not a kit) 1333 MHz (PC3 10600) 204-Pin DDR3 SO-DIMM KTA- MB1333/2G Includes one 2GB module of 1333MHz DDR3 Desktop memory for select iMac's Works with imac intel core i3/i5 21.5 inch and i5/i7 27 inch Memory designed, manufactured and tested to the specifications of each particular brand name computer system From the industry leader in PC memory 204-pin SODIMM type