C2G 25211 DB9 M/F Serial RS232 Extension Cable, Black (1 Feet, 0.30 Meters) Extend your RS-232 serial cable for more flexibility Extend an existing DB9 cable up to 50ft Place peripherals in the most convenient location Available in beige and black Don&#039;t sacrifice convenience when determining where to place your hardware! A DB9 extension cable can give you the flexibility to extend a computer peripheral wherever you need it. Each extension cable comes fully shielded to prevent unwanted EMI/RFI interference, Connector thumbscrews provide a quick and easy connection every time. Designed in various colors to look great in any space. Fully molded cable design delivers excellent strain relief. All lines are wired straight through.