4PK Compatible Dell Series 31XL (Series 33) Extra High Capacity Ink Cartridges for Dell V525w V725w Printers(Cyan, Magenta, Yellow & Black Value Pack) 1.Compatible Dell Series 31XL (Series 33) Extra High Capacity Color & Black Ink Cartridges 2.For use with Dell V525w & Dell V725w printers 3.Universal Compatible Cartridge replacement for Dell Series 31, 32, 33, 34 4.competitive price 5.good after-sales service