[Product function]: Install the charging column through the main panel, which is convenient and quick to use the battery terminal [Scope of application]: In the power supply system of automobiles, RVs, ships, yachts, racing cars, agricultural vehicles, etc. [Easy to Install]: Durable High Quality Material - Each heavy duty battery post is made of high quality material, made of copper core bushings and large brass nuts for maximum power transmission. The other side of the post has a 20MM stainless steel stud to handle the largest battery cable lugs [Mounting Bracket]: The powder-coated steel mounting bracket holds the battery posts securely in place no matter where you install it. This battery terminal relocation kit is a must have for your equipment, car, boat, recreational vehicle, tractor, UTV or ATV Product material: rubber + zinc alloy + brass color:Black Stud size: 20MM Opening diameter: 32MM Rated current: 250A Package Contents: 1 set x Battery Charging Posts 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.