Hitachi 57400 Compatible Cartridge for HP LaserJet 4V/4MV Replacement Toner Cartridge Premium laser cartridges that meet or exceed OEM quality, page yield, and reliability 100% satisfaction guarantee; expert technical support 1-year warranty; 100% performance guarantee; expert technical support: The use of this Dataproducts print cartridges does not void your printer's warranty Compatible Hardware: HP LaserJet 4V, 4MV Page Yield: 8,100