Carlon Multi-Gang Outlet Box Extension is a non-metallic, old work electrical box extension designed to extend electrical boxes that are set too deep in the wall. It is compatible with most single-gang or multi-gang wiring boxes, making it an i solution for remodeling projects. The extension snaps together quickly for multi-gang configurations, providing a maximum extension of 1 inch for added flexibility. Installation is straightforward and hassle-. Made from durable PVC (polyvinyl chloride), this extension is rust proof and does not conduct electricity, ensuring safety and longevity. Each extender includes two #6-32 x 1-1/4 inch screws for secure mounting. This product is intended for indoor use only and is UL listed for quality assurance. Model Number: B1MGEXT-2