Save and print even more when you shop with LD Products! This offer includes 1 331-8434C cyan laser drum unit; it replaces original Dell part numbers 331-8434, TWR5P and 59J78. Why pay twice as much for brand name Dell when our compatible printer supplies are guaranteed to meet or exceed the same quality standards as the original OEM brand? This cartridge is compatible with Dell Color Laser C2660dn, C2665dnf, C3760dn, C3760n and C3765dnf printers. Please note, retail packaging may vary and this cartridge will only work with printers purchased within the United States and Canada. The use of compatible printing supplies does not void your printer warranty. We are proud to offer a 100% satisfaction and LIFETIME guarantee on all compatible and remanufactured printing products. We are the exclusive reseller of LD Products brand of high quality printing supplies on Amazon.