Our compatible replacements for the Dell Series 33/34 extra high yield black inkjet cartridges are manufactured to the highest specifications and performance standards. Our replacement for the Dell Series 33/34 ink cartridge is backed by a full 100% satisfaction guarantee. We guarantee that you will get excellent quality printouts from our inkjet cartridges or your money back. Our compatible alternatives to the Series 33/34 cartridges have updated chips and work with your Dell V525w or V725w printer. Alternative part numbers for this cartridge are 331-7377, 331-7417, 331-7387, Series 34, Series 33, Series 33R, T9FKK, KNTYH, KVH6V, H8GCY, 2T2PT. LD Cartridges are manufactured in an internationally certified ISO 9002 factory. LD cartridges come with a 100% Two Year money-back guarantee and technical support. For use in the following printers: Dell V725w, V525w. We are the exclusive reseller of LD Products brand of high-quality printing supplies on Amazon.