Premium T702xl120 (Epson 702XL) Ultra High Yield Black Ink Cartridge fully compatible with the Epson WorkForce 3720. The use of compatible supplies does not void your printer warranty.
Premium bundled T802XL0-420-S (Epson 802XL) High Yield Black, Cyan, Magenta, Yellow Ink Cartridges Value Bundle, 4pk fully compatible with the Epson WorkForce Pro WF-4720, WF-4730, WF-4734, WF-4740. The use of compatible supplies does not void your printer warranty.