256MB DDR2 144pin Memory Upgrade for Brother Laser Printer HL-4150CDN HL-4570CDW HL-4570CDWT 16-bit One (1) 256MB DDR2 144pin 16-bit memory upgrade Part#: HL533/256 100% compatible with lifetime replacement warranty Manufactured by Keystron, LLC Keystron is a registered trademark of Keystron, LLC