Specs: Sun 128mb SDRAM DIMM X6991ASun Spare PN: 370-4149Sun Option/Kit PN: X6991AThe X6991A is a fully tested Sun 128mb SDRAM DIMM. The X6991A has been fully refurbished by Serverworlds.com. The X6991Awill be professionally packed and shipped out via fedex to the Lower 48 States.Free Ground Shipping to the lower 48 States