256MB DDR2 144 pin DIMM Memory Third Party Equivalent to CB423A Compatible with : HP Laser Jet P2015 P2015d P2015dn P2015n P2015x P2055 P2055d P2055dn P2055x M2727nf P3005 P3005d P3005n P3005dn P3005x CM2320 CM2320fxi CM2320nf CP1515n CP1518ni CP2025n CP2025dn CP2025x CP5225x CP5225dn Laser Jet Pro CP1525NW.