2 GB X 2 memory slot inserts in case.
I upgraded to 2 X 4GB memory as soon as I bought my new MacBook Pro, so these haven't even been used. Very easy to self-install and increases computer speed with more RAM.
Compatible with Apple MacBooks with Intel Core 2 Duo

Specs:
Part Number: CT1025913
Module Size: 4GB kit (2GBx2)
Package: 204-pin SODIMM
Feature: DDR3 PC3-8500
CL=7 • Unbuffered • NON-ECC • DDR3-1066 • 1.5V • 256Meg x 64

E-mail me with more questions. You pick up in Menlo Park or on Stanford's campus (Green Earth Science building or Tresidder) $35 or best offer.
Thanks!