Compatible High Yield Toner Cartridges (Alternative to HP 934XL)

For HP Officejet 6812, Officejet 6815E All in One, OfficeJet PRO6230, OfficeJet PRO6830, OfficeJet PRO6835. Yield up to 1,000 pages each. Pack of 4 cartridges including : black, cyan, magenta and yellow.