OLYBSJET BT-2580P Original Solvent Fast Dry Ink Cartridge for Handheld InkjetA black solvent-based fast-dry ink cartridge replacement for certain handheld inkjet printers. The cartridge holds 42ml of ink and can typically print over 100,000 characters before needing replacement. The quick-drying formula is designed for continuous printing but should be covered with the protective cap when not in use to prevent air-drying and nozzle blockage. Store in a well-ventilated area away from heat sources to maintain print poundsProductdimensions2.8 x 3.9 x 0.8 inches