• 128MB 100pin PC100 SDRAM DIMM • P/N: C9121A • Brand New with life-time warranty • Compatible: HP color laserJet 2500, 2500Lse, 2500L, 2500N, 2500TN, 2500; 2550, 2550L, 2550LN, 2550N, 2550TN, 2550EN series.