Package includes: 1 x CF540A Black, 1 x CF541A Cyan, 1 x CF542A Yellow, 1 x CF543 Magenta.Page yield:Up to 1,400 pages per black toner cartridge and 1,300 pages per color toner cartridge at 5% coverage.*Tips: Please confirm your printer model#.Printer Compatibility : HP Color Laserjet Pro M254nw MFP M254dw.HP Color LaserJet Pro MFP M280 M280nw M281cdw M281fdn M281fdw.Installation Instruction: 1. Before use, shake the new toner cartridge horizontally for several times to make sure the toner powder is well distributed. 2. Pull out the black paper cover out of the toner cartridge's body in the direction of the arrow shown. 3. Pull out the sealing tape at a slow and constant speed as to prevent the tape from breaking midway. 4. Carefully install the new toner cartridge into your printer and you are all set to print. How to contact us: Log in your amazon buyer account > Click Your Account > Your Orders > Find your order and click CONTACT SELLER, then we will give you a response as soon as possible.