Genuine OEM HP Deskjet 3635 Ink and Supplies

For the HP Deskjet 3635, the difference between HP 63 and HP 63XL is cartridge capacity. The XL version prints more pages, and you can make that choice independently for black and tri-color instead of treating both inks as one purchase.

Toner Buzz carries genuine HP 63 and HP 63XL ink for the 3635 as singles and black-and-color packs. Individual cartridges let you match each capacity to your printing; a pack groups the two inks in one order, but its contents need not have matching capacities.