CompuCablePlusUSA. com Best High Density RS232 Serial Adapter Cable to Bare Wire End, High Density DB15, Shielded, Molded Socket (Female) with Bare Wire Leads, 25 Feet Length; Each Wire Lead is a Separate Color for Easy Identification and They Are Labeled with the Pin that They are Connected to. Those with High Density DB15 Connections are RS-232, so They Transmit Data between Computers and Equipment. The Thumb Screws on These Connectors have Slots so They Can be Tightened with a Screwdriver in Tight Spaces.