ESR HP 42X Toner Black 20000p 80038657 K12157X1 Product Description: ESR - black - compatible - remanufactured - toner cartridge (alternative for: HP 42X) Product Type: Toner cartridge Printing Technology: Laser Printing Colour: Black Yield: Up to 20000 pages Packaging Type: Carton Pricing Type: Remanufactured Manufacturer Warranty: Limited lifetime warranty Compatible with: HP LaserJet 4240, 4240n, 4250, 4250dtn, 4250dtnsl, 4250n, 4250tn, 4350, 4350dtn, 4350dtnsl, 4350n, 4350tn