HP Color LaserJet Memory Upgrade Kit  
    • Part Number: Q7722A, C2631A 
    • One 256MB module
    • Compatible: HP Color LaserJet 3000n, 3000dn, LaserJet 3800, 3800dn/3800dtn & 3800n, 4650, 4700, 4700N, 4730mfp, 4730x mfp, 4730xm mfp, 4730xs mfp, 5550 series