Up for auction is a pair of Crucial SO-DIMMs taken from an older Apple MacBook Pro. These particular SO-DIMMs are 4GB each and are dual rank (2Rx8) with spec PC3-8500S. The Crucial part number is CT4G3S1067M.M16FKD. These SO-DIMMS have 204 pins and are 1066Mhz speed. These are DDR3 non-ECC memory modules.