Epson WorkForce WF-3640 DTWF :
These are aftermarket products and NOT Genuine Epson Products
Our Compatible Cartridges are guaranteed to give you the same results as new Epson cartridges at savings of up to 50%. You use them exactly the same as you would new Epson cartridges - when your printer runs empty, you remove the old cartridge, replace it with one of our Compatible Cartridges and continue printing just as you would with a new Epson cartridge. Save money without compromising print quality!