The DuraPort industrial connectivity products provide IP67-class protection to safeguard your connectivity from humidity/moisture, corrosive materials, temperature extremes, and other conditions often found in an industrial environment. Connector contacts are high-quality copper-based alloy, plated with over 100 micro-inches of nickel for maximum life and lowest electrical contact resistance. Twist-lock design for faster installation and changes. Mount on PLC enclosures 1.25-inch diameter opening.