Ink Compatibility: v4ink Bentsai BT-2580P black ink cartridge is built with self-developed encrypted chip and can compatible with v4nk and Bnetsai BT-HH6105B2 and BT-HH6105B3 handheld printers running firmware V1069 or 1.0.10 to 3.0.28. For firmware 4.0.34 or models BT-HH6105F, BT-HH6205B and 6205BL, please use BB21B or BB22B series ink instead Cost-effective with Extensive Output: Featured with a 1/2 inch (12.7mm) print head, each BT-2580P ink cartridge contains 42mL high capacity to print up to 2,000,000 characters at 2.5mm print height using the 7th grey level, providing cost-effective daily printing. Wide Applications: BT-2580P ink cartridge is solvent ink and dries in seconds. Can attach to water absorbing materials and non-porous surfaces, including: carton, wood, paper, clothes, gypsum board, fiberboard, plastic, ceramic, glass, metal, aluminum foil, etc. Excellent Print Quality: The ink cartridge for v4ink Bentsai handheld inkjet printer use patented ink formula to deliver high quality prints with waterproof and smudge-free effects. Ink is quick drying in seconds. Maintenance Tips: To maintain optimal performance, remove the cartridge from the printer when not in use and cover the ink nozzle with the protective cap. If clogging occurs, gently wipe the nozzle with an alcohol wipe. The v4ink Bentsai BT-2580P black ink cartridge is a fast-drying solvent ink that dries in seconds and offers superior waterproof performance and high print quality. It is compatible with v4ink Bentsai handheld printers BT-HH6105B2, BT-HH6105B3, and Bentsai B10 mini, allowing you to print text, dates, QR codes, barcodes, logos, images, batch numbers, and more on various surfaces. With a 42ml ink capacity, each cartridge can print up to 2,000,000 characters.