Tripp Lite Null Modem Serial RS232 Cable (DB9 M/F) 6-ft. (P454-006) 6 feet Null Modem Gold Cable (DB9 F/M) Superior molded cables with foil-shielding for maximum EMI/RFI protection Gold-plated connectors provide superior conductivity Null modem cables connect two serial devices that require a null modem configuration Lifetime warranty