The Nickel-Plated Brass Dome Cap Connector contains a standard nylon connector in a broad range of sizes with either NPT or Pg threads. This connector also has a spiral-flex extended version for greater support and arc of bend, which will prevent sharp bends or kinks, and also for additional damage protection from moving machinery. It has been designed to the IP 68 standard for underwater, up to a depth of 130 feet. This device is also engined with 6 internal 'fingers' that clasp onto the cable shielding to prevent 360º electromagnetic interference. They also feature ventilation plugs that can decrease the adverse affects of humidity in the environment as well as gases and vapors. These connectors are designed for the tough rigors of spontaneous flexing & bending. They can be utilized with a broad range of wires both indoors & outdoors.