Welcome to the Sharp MX-C312 product page. Here you can find information and pricing for your Sharp MXC40NTC Genuine Sharp Toner Cartridge. Easy online ordering of your MXC40NVB Black Genuine Sharp Developer, MXC40NTM, MXC40NVY, MXC40NTB, MXC40NVB, can be completed from this page. Tonerprice.com backs all of our cartridges with our exclusive warranty. As always, we provide free ground shipping on orders over $75 within the contiguous United States from 5 warehouses nationwide.