Usage Tips:KEEP CORDS SAFE: The RV Supplies | 30 Amp Locking Connector with Cover Boot and Ring is designed to secure and protect your cord connector and keep a weatherproof seal for your RV, , trailer, marine watercraft, and other outdoor applications; For regulating and waterproofing purposes USE YOUR CONNECTOR: Quickly locks the cord set in the inlet; Side grips for an easy and secure connection; Designed for use with round jacketed, hard usage cable (S-type), 8-3AWG; As long as you have a female cord connector with the same 30A 125VAC configuration, this connector will fit your application PERFECT SIZE: 7.5-inch (19.1cm) assembly overall length; Cover and ring - 1.75-inch (4.4cm) inner diameter (ID); 3-inch (7.6cm) outer diameter (OD); 3-inch (7.6cm) inside depth; 5-inch (12.7cm) outer length; Connector - Approximate measurement across the face is 1.75 inches (4.4cm); Across the back where the cord enters adds 0.25 inch (2 inches / 5.1cm across); Total length is 3.9 inches (9.9cm) BUILT TO LAST: Cover constructed with a bright yellow rubber body and black heavy-duty plastic ring for extra with no leaks; 30 Amp 125 Volt rating; Replace your power cord with this twist lock connector so the cord can be removed and stored without leaving an opening that mice or insects can enter and wreak havoc Remove housing by loosening face screws, slide weather-resistant boot over cable, and slide housing over cable; Strip cord outer jacket and each individual conductor to expose the copper wire; Insert all wires into proper color-coded terminal pockets; Tighten terminal screws and strain relief screws; Slide housing over connector body, tighten assembly screws, and slide weather-resistant boot over complete assembly Material: ABS Color as shown Package Contents: 1set Connector with Twist Lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.