HP 2550 2820 2830 2840 4-Color Toner Refill Kit with Reset Chips. 610 Grams. By Toner Eagle Toner is designed specifically to work in the Q3960A, Q3961A, Q3962A and Q3963A toner cartridges for use in the HP LaserJet 2550, 2550L, 2550Ln, 2550n, 2800, 2830, 2820, 2820 All-in-One, 2840 and 2840 All-in-One laser printers. We test many toner samples from toner manufacturers. Most are rejected as they do not meet the look and specifications of the OEM toner. The toner we sell DOES match OEM toner! You will save up to 80% on the cost of your toner cartridges. Refilling your own toner cartridges is more environmentally friendly than buying new, compatible, or even remanufactured toner cartridges. We provide easy-to-follow instructions with photographs of the process. The process is so easy that most people do not need help. But if you do need help, we're just a phone call away! We guarantee that you will be happy with your purchase or we'll refund your money.