Simply ignore the low ink warning and continue printing. Compatible with HP DeskJet 1110 2130 2132 2133 2134 3630 3632 3633 3634 3636 3637 3638 3639 Printers. A REAL 302XL black should have a sponge visible in the lower holes if you peal off the top sticker and weigh a min 34g.
