AZ 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. Your time is valuable. Get a quality product that you KNOW will work. Purchase the AZ Supplies compatible with Dell S3840, 4 Color Toner Cartridge Set (Black, Cyan, Magenta, Yellow) experience the difference! All AZ 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 any problems for all AZ Supplies brand products. The use of AZ Supplies brand replacement laser toner Cartridges and supplies does not void printer warranty. Premium Quality Replacement Toner Cartridges 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 S3840 laser toner Cartridges. The compatible toner Cartridges will produce the same amount of page yield as an OEM Cartridges would. This is a Compatible with Dell 593-BCBC, 593-BCBF, 593-BCBE, 593-BCBD 4 Color Toner Cartridge Set guaranteed to perform with Laser Printers. It replaces the original 593-BCBC, 593-BCBF, 593-BCBE, 593-BCBD 4 Color Toner Cartridge Set . The use of compatible replacement Cartridges and supplies does not void Printer Warranty. Our Compatible S3840 Cartridges is a replacement for OEM Dell . We offer a 100% Quality Satisfaction Guarantee on our Compatible S3840 Laser Toner Cartridges and supplies. For use in the following Dell printers: S3840CDN, S3845CDN