Sigma's weatherproof round lampholder covers with one 1/2-in hole provides a mounting location for a single lampholder. Their rugged, die-cast construction prevents moisture penetration and is powder coated for corrosion resistance. These covers compliment Sigma's round boxes and lampholders with 1/2" threads. They are suitable for installation in wet, damp or dry locations and include hardware and gasket. Sigma Engineered Solutions Round White Metal Weatherproof Electrical Box Cover…