CB423A is a 144-pin memory DIMM compatible with Hewlett Packard LaserJet 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.