661-5639 2 GB, SDRAM, DDR3 1066, SO-DIMM for Macbook NB-5037W
This is a 2GB Ram upgrade for various Mac models. THIS IS A SINGLE CHIP, NOT TWO CHIPS. Specs: 2GB DDR3 PC3-8500 SODIMM.
Apple part number: 661-5639
MacBook (13-inch, Mid 2010)
661-5639 2 GB, SDRAM, DDR3 1066, SO-DIMM for Macbook