Keystron 256MB DDR2 144pin 16bit Memory Upgrade for Brother Laser Printer MFC-L8600CDW, MFC-L8850CDW, MFC-L9550CDW 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