Rosewill RTCA-52102001 6 Packs Ribbon Replacement for Okidata ML120/172/180/190/320/321 Series and Turbo Series, Black Cartridge Color: Black Compatible Product: OKIDATA ML120, ML172, ML180, ML182, ML183, ML184, ML192, ML193, ML194, ML195, ML240, ML280, ML320, ML321, ML380, ML388, ML390, ML391, ML420, ML421, ML3320, ML3321, ML5320, ML5330, ML8320 Note: Yield information is an estimation based on 5% page coverage. Actual yield may vary depending on machine, paper type, humidity, and actual prints.