What is/are in the package? 3-Pack 045H (C+M+Y) Toner Cartridge High Yield How many pages do these print up to? up to 2,800 pages for 045H Black Toner Cartridge, up to 2,200 pages 045H Cyan 045H Yellow 045H Magenta Toner Cartridge, based on 5% coverage (High Yield) How do you install the toner cartridge? ?Remove the orange cover ?Pull out the plastic tag (where you see the orange ring) which is on the side of the cartridge, if applicable ?Insert into the printer ?Enjoy printing! What are the compatible printers? Color ImageCLASS MF634Cdw, Color ImageCLASS MF632Cdw, Color ImageCLASS LBP612Cdw, ImageCLASS MF634 MF632 printer GTS offers money back warranty on defective toner cartridges Please store the unused/unopened toner cartridges in a dry and cool place. Avoid sun exposure Have a question or a problem? Please do not hesitate to contact us, our Customer Services Team will usually response your email or message within 1-2 business days.