Tripp Lite 6 Null modem gold cable uses copper conducting material to resist corrosion and lets you connect 2 serial devices that need cross-wired configuration. Tripp Lite Null Modem Serial RS232 Cable DB9, null modem cable, 6 ft Type: Null modem cable. Technology: Shielded. Cable Features: Molded , gold plated connectors. Length: 6 ft. Connectors: 1 x 9 pin D-Sub (DB-9)- female. Connectors (Other Side): 1 x 9 pin D-Sub (DB-9)- male. Manufacturer Warranty: Limited lifetime warranty.