The black 42126644 remanufactured drum unit for the OKI C3100 printer offers a reliable high quality alternative to the OKI original 42126644 version, but at more reasonable price. The drum units purpose is to hold the powder from your toner cartridge and then to place the powder onto the correct part of the page.We source all of our drum units from some of the best professional remanufacturers, who ensure that all worn parts have been replaced and tested to give the customer a great quality product. We are so confident in our products that every drum unit comes with a 100% satisfaction guarantee.The price of the black 42126644 remanufactured drum unit includes VAT and delivery, so that the price you see is the price that you pay.