Konica Minolta bizhub C659 Black Drum Unit Specifications and Details. Mfr PN : A9K70RD / DR-712K.The item "Genuine Konica Minolta (DR-712K) Black Drum Unit" is in sale since Sunday, June 16, 2019. This item is in the category "Computers/Tablets & Networking\Printers, Scanners & Supplies\Printer Ink, Toner & Paper\Toner Cartridges". The seller is "copierserviceconnection-7" and is located in Lansing, Illinois. This item can be shipped to United States.