This is a OEM RIBBONS OKIDATA brand Ribbon Supply (PRINT RIBBON) that works with the following printers / machines (ML380, ML390, ML390T, ML391, ML391T, OKIMATE 240). This is a Ribbon Supply, that has a yield of 2 MILL, and part number is OKI52104001. This OKIDATA ML390 comes with a 100% guarantee and is extremely well priced for value shoppers and business users alike. Perfect for home or office use. Ships fast and accurately. PRINT RIBBON. ML380, ML390, ML390T, ML391, ML391T, OKIMATE 240. OEM OKIDATA Brand.