What is/are in the package? S35 (2xBlack) How many pages does this print up to? Black Up to 3,500 Pages per cartridge How do you install the toner cartridge? ?Remove the orange cover, if applicable ?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? imageClass D300 D320 D340 D360 D383 FAXPHONE L170 L400 Class 310 510 PC310 Fax-L380 Fax-L380S Fax-L390 PC-D320 D340 Printer What is the warranty? Green Toner Supply offers 1-Year money back warranty on defective toner cartridges What is the shelf life? Suggested shelf life: Up to 36 months 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.