Low total cost of ownership saves you time and money. HP Color LaserJet C4194A Yellow Print Cartridge for the Color LaserJet 4500/4550 Printer series. Maximum-capacity cartridge prints approximately 6000 pages, based on 5% average coverage, and contains the toner and developer. Designed to work flawlessly with HP LaserJet Soft Gloss Paper and HP Color LaserJet Transparencies. Replacement frequency is about every 3-4 months, although usage rates will vary widely.