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 maintain 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 provide an easy and secure connection; designed for use with round jacketed, hard usage cable (S-type), 8-3 AWG; compatible with any female cord connector that has a 30A 125VAC configuration PERFECT SIZE: 7.5-inch (19.1 cm) overall assembly length; cover and ring - 1.75-inch (4.4 cm) inner diameter (ID); 3-inch (7.6 cm) outer diameter (OD); 3-inch (7.6 cm) inside depth; 5-inch (12.7 cm) outer length; connector - approximate measurement across the face is 1.75 inches (4.4 cm); across the back where the cord enters adds 0.25 inch (2 inches / 5.1 cm across); total length is 3.9 inches (9.9 cm) BUILT TO LAST: Cover constructed with bright yellow rubber body and black heavy-duty plastic ring for added durability with no leaks; rated 30 Amp 125 Volt; 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 INSTALLATION: Remove housing by loosening face screws; slide weather-resistant boot over cable; slide housing over cable; strip cord outer jacket and each individual conductor to expose 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; slide weather-resistant boot over complete assembly Material: ABS Color as shown Package Contents: 1 set 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 to vary slightly from the real thing; measurement allowed error is +/- 1-3 cm