As you print more, HP helps reduce your company's printing costs with an option designed for customers who print high-volumes - HP LaserJet Toner Cartridge Dual Packs. You get the same consistent, professional results and reliable, trouble-free printing of Original HP. And you get double the print volume at a lower price with this convenient, high-value option.Original HP printing supplies are easy to buy, easy to manage, and easy to use. And with the added convenience of HP Dual Packs - two Original HP 78A Black LaserJet Toner Cartridges, you can keep interruptions to a minimum.Original HP LaserJet toner cartridges represent up to 70% of the printing system and are designed with the printer to provide the reliable, professional results that save you time. HP Dual Packs further reduce your printing costs to save you money.