LD Products offers premium, low-cost alternatives to expensive name brand toners and drum units! Below find the compatible replacement for the Okidata C831 series laser toners and drum units. Made with brand new parts, our compatible supplies are built to produce output almost identical to the original brand. Original Okidata supplies are also available for the C831 series. Order compatible Okidata supplies with LD Products and receive a full 100% satisfaction guarantee!