The Pacific Ink Uni-Kit Refill Kit for HP 40 51640A Black Ink Cartridge will allow you to save up to 80% when compared to buying new cartridges. Each kit includes all necessary tools, step by step instructions, and 24 hour tech support (via email). Your refill kit contains 3 bottles of black inks (30ml each) formulated to work with ANY black inkjet cartridge. NOTE: CARTRIDGE NOT INCLUDED.
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