Non-OEM, (4 x 100ml) Bulk 4 Black refill ink for HP inkjet printer Total 400ml Black ink(4 x 100ml) and 1 long needle syringe.No refill instruction. This ink is produced in dustless workshop & with third time filtration, particulate at size in 0.2. So the nozzle won't clog. This ink is Anti-UV dye ink, which can resist against sunshine so that printings can last longer in color. This ink was made with the color paste from USA and the chemical additive/formula supplied from Germany and Japan. Made in China. 100% compatible to HP printers. Each 100ml ink = 5~7 cartridges.