Question: We just purchased an A4M laser mailing system for printing envelopes that uses a Kyocera FS-4000DN printer for the actual printing from you. Please provide me with pricing to purchase the toner cartridge? Answer: Here is a link to purchase the toner for the A4M Laser Mailer, online, see link for details. http://suppliesformailers.com/index.asp?PageAction=VIEWPROD&ProdID=291