16GB Total. two 8GB PC3-10600S 204 pin SODIMM DDR3 1333MHz 

THIS MODULE IS MANUFACTURED BY Computer Memory Solutions

 LIFETIME WARRANTY BY Computer Memory Solutions 

*Apple officially supports a maximum of 8 GB of RAM, but as first confirmed this model actually is capable of using up to 16 GB of RAM with two 8 GB memory modules.

 MAX MEMORY:16GB SOCKETS 2 

COMPATIBLE WITH: Apple MacBook Pro "Core i7 2.4 17" Late 2011 MD311LL/A