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Clever Supplies brand products are made in the USA! Why pay more for cheaper product with a high defective rate? You will end up having to send it back to the manufacturer. Get a quality product that you KNOW will work. Purchase the Clever Supplies Products Compatible for Samsung SL-M4020 (MLT-D203U) Toner Cartridge Black and experience the difference! All Clever Supplies brand products are backed by '100% Quality Satisfaction' 1 year warranty against defects in materials and workmanship for all toner products. Free tech support for a Clever Supplies problems for all Clever Supplies brand products. The use of Clever Supplies brand replacement laser toner cartridges and supplies does not void printer warranty. Premium Quality Replacement Toner Cartridge is made by ISO9001 Certified Factory to Meet or Exceed OEM Standards. These units are manufactured 100% brand new with all new parts including OPC drums, wiper blades, a smart chip and other internal parts, they are an economical alternative to expensive OEM MLT-D203U, Compatible Toner Cartridges. This is a Compatible for Samsung SL-M4020Toner Cartridge Black guaranteed to perform with Samsung Laser Printers. It replaces the original Samsung SL-M4020 toner cartridge MLT-D203U Black. The compatible replacement for MLT-D203U. We offer a 100% Quality Satisfaction Guarantee on our Compatible for MLT-D203U Laser Toner Cartridges and supplies. For use in the following printers: SL-M4020 ND, SL-M4070 FR