Specs: Sun 2 x 256mb DIMM, 50ns 512mb Memory Kit X7039ASun Spare PN: 370-3799Sun Option/Kit PN: X7039AThe X7039A is a fully tested Sun 2 x 256mb DIMM, 50ns 512mb Memory Kit. The X7039A has been fully refurbished by Serverworlds.com. The X7039Awill be professionally packed and shipped out via fedex to the Lower 48 States.Free Ground Shipping to the lower 48 States