The Tru Red/Staples Black Drum Unit Brother DR-420 2839039 is a new sealed toner cartridge compatible with Brother printers. This solid ink cartridge in black color is made of plastic and has dimensions of 15.29 inches in length, 5.59 inches in height, and 9.29 inches in width. It is designed for use in printers and comes with a manufacturer's warranty from Staples Brands Group. The brand Tru Red is known for producing high-quality printing supplies, making this drum unit a reliable choice for those in need of a black ink solution for their Brother printer.