256MB KIT (2 x 128MB) For HP-Compaq LaserJet Series 2300 2300d 2300dn 2300dtn 2300L 2300n 2500 2500DN 2500L 2500N 2500TN 4100 4100dtn 4100n 4100tn 4200dtn 4200dtns 4200dtnsl 4200n 4200tn 4300dtn 4300dtns 4300dtnsl 4300n 4300tn 9000 HNF 9000 MFP 9000DNS 9000L MFP 9055mfp 9065mfp. SO-DIMM SD NON-ECC PC66 66MHz RAM Memory. Genuine A-Tech Brand. 256MB KIT (2 x 128MB) SO-DIMM SD NON-ECC PC66 66MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq LaserJet Series. (See Compatibility List Below)