Revolutionary design expands from 1 in. to 3 in. for In-Use needs. This cover is made from ultra-rugged polycarbonate & synthetic neoprene rubber that will not dry rot, crack or deteriorate in sunlight. It features a quick-Fit keyhole mounting system that allows installation in under a minute and has a universal Fit Adapter System Technology (U-Fast) for 16-in-1 custom device configurations, comes pre-configured for GFCI.