128MB STICK For HP-Compaq Business InkJet Series 2800 2800dt 2800dtn. SO-DIMM SD NON-ECC PC66 66MHz RAM Memory. Genuine A-Tech Brand. 128MB STICK 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 Business InkJet Series. (See Compatibility List Below)