Manufacturer: Hewlett-Packard Manufacturer Part Number: C4191A-KIT Manufacturer Website Address: www.hp.com Brand Name: HP Product Name: Black Toner Cartridge Marketing Information: Industry-leading low cost-per-page outputs. HP Ultraprecise Toner Cartridge with black toner for the Color LaserJet 4500/4550 Series printers. Maximum-capacity cartridge prints approximately 9,000 pages, based on 5% average coverage. 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. Package Type: Retail Product Type: Toner Cartridge Technical Information Print Technology: Laser Print Color: Black Duty Cycle: 9000 Page Print Coverage: 5% Environmental Conditions Temperature: * 50Â°F (10Â°C) to 91Â°F (32.8Â°C) Operating * -4Â°F (-20Â°C) to 104Â°F (40Â°C) Storage Humidity: 20 to 80% Relative Operating Miscellaneous Package Contents: 4 x Cartridge Additional Information: * HP Ultraprecise Spherical Color Toner is chemically grown for uniform particles and consistent color. Industry-leading low cost-per-page for full color output.