I'm selling a 512mb ram stick that was pulled from a 2 month old Macbook Pro. This stick is 1 module, DDR2, SO-Dimm, clocked at 667mhz. You can use this stick in an intel Mac Mini, Intel Imac, Macbook Pro or Macbook. I believe some some PC laptops may take this ram but you have to inquire with the vendor. This is a good buy if you need to get some decent performance (add this to your existing 512mb, for a total of 1gb or to a 1gb stick for 1.5gb). I will sell for $80.00 cdn or best offer. I am located in Nepean. Please pm me or e-mail for details.