16GB Total. 4pcs of  4GB PC3-18500 204 pin SODIMM DDR3 1066MHz CL7

THIS MODULE IS MANUFACTURED BY Computer Memory Solutions

LIFETIME WARRANTY BY Computer Memory Solutions

MAX MEMORY: 16GB

SOCKETS 4

COMPATIBLE WITH:

Late 2009 - MB950LL/A* - - -

Apple iMac "Core 2 Duo" 3.06 21.5-Inch (Late 2009)