Shop At 247 &reg; Compatible Toner Cartridge Replacement for HP CB436A (Black, 2-Pack) Shop At 247 brand cartridge is sold exclusively by Shop At 247 Shop At 247 offers One-Year Warranty against defects Shop At 247 offers 180 Days Money Back Guarantee Up to 2,000 Pages at 5% Coverage These replacement cartridges were professionally manufactured in an ISO 9002 factory