The Air Line Box - Single Trailer Harness Connector Hole is a practical and hassle-free solution for your trailer lighting needs. Made from durable 14 gauge stainless steel, this product fits 4" lights with grommets and comes with (2) 4" bezels. With its secure mounting to frame rails, it is compatible with most makes and models. The light holes only option -10 ensures easy installation, while the stainless steel construction guarantees long-lasting durability. This product is sold individually and does not include a back plate.