SunDataSupply.com: SHRMX312NT - Sharp MX-312NT Original Toner Cartridge: Office Products - Sun Data Supply
how do i check the toner level on my sharp mx copier - YouTube
Amazon.com: MADE IN USA TONER Compatible Replacement for Sharp MX312NT ,MX-M260, MX-M264N, MX-M310, MX-M314N, MX-M354N (Black, 2-Pack) : Office Products