This New Compatible Laser Toner Cartridge design for HP C3903A Designed for maximum performance. 100% Guaranteed. For use in the following printers: Hewlett Packard: LaserJet 5P, 5MP, 6P, 6MP, EP-V, VX HP C3903A, HP 5P, HP 5MP, HP 6P, HP 6MP 3-Month Warranty Free Shipping