HP Deskjet 3940 Color Inkjet Printer

HP 21 Black Original Ink Cartridge. Cartridge capacity:  Standard Yield, Black ink type:  Pigment-based ink, Black ink volume:  5 ml, Quantity per pack:  1 pc(s), Black ink page yield:  190 pages

Ideal for basic printing in text and graphics, low-volume printing.
Print brilliant colour photos and bright graphics using an ink cartridge designed to work with your HP printer.

HP 21 Black/22 Tri-color 2-pack Original Ink Cartridges. Cartridge capacity:  High (XL) Yield, Black ink type:  Pigment-based ink, Colour ink type:  Dye-based ink, Supply type:  Multi pack, Colour ink page yield:  165 pages, Quantity per pack:  2 pc(s), Black ink page yield:  190 pages

HP 21XL High Yield Black Original Ink Cartridge. Cartridge capacity:  High (XL) Yield, Black ink type:  Pigment-based ink, Black ink volume:  12 ml, Quantity per pack:  1 pc(s), Black ink page yield:  475 pages