Genuine OEM HP LaserJet 4250dtnsl Toners
HP 42A and high-yield HP 42X are the black toner choices for the LaserJet 4250dtnsl. The Q5421A maintenance kit serves a different role and is not part of a toner change.
Toner Buzz carries genuine HP 42A and 42X cartridges, including a 42X two-pack, plus the maintenance kit. Start with the printer message, then select the toner capacity, pack size, or service part it calls for.