The HP 42A Black LaserJet Toner Cartridge Q5942A is a genuine/original product manufactured by HP in Japan. Specifically designed for HP printers in the 4240, 4250, 4300, and 4350 Series, this black toner cartridge is a single unit perfect for producing high-quality laser prints. With its OEM box opened but sealed, customers can trust that this product is brand new and ready to provide consistent and reliable printing results. Ideal for businesses or home offices looking for top-notch printing supplies, this HP toner cartridge ensures crisp and professional-looking documents with every print.