Revolutionary patented design expands from 1 in. to 3 in. for In-Use needs Ultra rugged polycarbonate & synthetic neoprene rubber that will not dry rot, crack or deteriorate in sunlight Quick-Fit keyhole mounting system allows installation in under a minute Universal Fit Adapter System Technology (U-Fast) for 55-in-1 custom device configurations, comes pre-configured for GFCI 100% paintable surface Clear window allows for quick/easy visual inspection Includes attached gasket and mounting hardware