CB423A 256MB DDR2 144-pin DIMM Printer Memory for HP LaserJet CM2320nf CP1515n CP1518ni CP2025n CP2025dn CP2025x CP5225x CP5225dn Laser Jet Pro CP1525NW 256MB DDR2 144pin memory upgrade for HP laserjet printers Part#: CB423A 100% Compatible with Lifetime warranty Manufactured by Keystron, LLC Keystron is a registered trademark of Keystron, LLC