3ft DB25 female to female extension cable extends serial or parallel cables for printer or modem. Place your serial printer or modem wherever you want with this economical DB25 extension or extend existing serial or parallel cables to connect through a switchbox or buffer or to connect to a modem. Remember that all 25 lines connect straight through pin-to-pin. Each cable is foil shielded for EMI/RFI protection and is available fully molded with thumbscrew connectors for a fast, easy connection every time.