HP 646A Yellow LaserJet Toner Cartridges keep your business productivity high. Original HP print cartridges with HP ColorSphere technology deliver consistent, professional colour on marketing, financial, design and engineering documents. Keep printing costs low while maintaining productivity. HP colour LaserJet toner cartridges deliver consistent, uninterrupted printing. Because cartridges are designed for exceptional reliability, you avoid wasted supplies and expensive delays. Produce standout business documents and marketing materials, using Original HP toner cartridges with HP ColorSphere technology. Get consistent, print shop-quality results on a wide range of laser papers designed for professional office printing. Install cartridges quickly and easily - plus intelligence built into Original HP toner cartridges makes usage tracking and reordering simple. Enjoy easy recycling - cartridges returned via HP Planet Partners are recycled responsibly.