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 x16 bit ram memory upgrade for hp laserjet printers. compatible with hp laserjet cm2320fxi, cm2320nf, color laserjet cm2320, cp1510, cp2025ndn, cp2025nx, cp1515n, cp1518ni, cp1525nw, cp2025dn, cp2025n, cp2025x, cp5225dn, laserjet 3005n, p2055, laserjet pro 300 color m375nw, 300 m351a, 400 color m475dn, 400 m451dn, 400 m451dw, 400 m451nw, m2727nf, p2015, p2015d, p2015dn, p2015n, p2015x, p2035n (ce462a), p2055d, p2055dn, p2055x, p3005 (q7812a), p3005d (q7813a), p3005dn (q7815a), p3005n (q7814a), p3005x (q7816a), pro 400 m401dn.