128MB HP LaserJet Printer 100-pin Memory for HP LaserJet 1320 2300 2505 2550 2605 2700 2820 2840 3390 3392 4100 4200 4300 5100 8150 9000 (p/n C9121A, Q9121A, Q7709A) P/N: C9121A, Q9121A, Q7709A, KTH-LJ4100/128. One 128MB 100pin Sdram sodimm Compatible with Hewlett Packard Business InkJet 1320, 2300, 2300n, 2300dtn; 2800, 2800dt, 2800dtn; 3000, 3000dtn, 3000n; Color LaserJet 2500 L/n/tn; Color LaserJet 2505, 2605dn, 2605dtn; Color LaserJet 2550 L/Ln/n; Color LaserJet 2700, 2700n, 2820, 2840; LaserJet 1320,1320n,1320tn,1320nw, 2300, 2300L, 2300d n/dn/dtn, 3390, 3392, 4100, 4100DTN, 4100MFP, 4100N, 4100TN, 4101mfp, 4200 n/tn/dtn/dtns/dtnsl, 4300 n/tn/dtn/dtns/dtnsl, 5100, 5100tn,5100dtn, 8150, 9000 n/dn/hns; OfficeJet 9100 Series 9110, 9120, 9130