The Southwire - Topaz line of weatherproof electrical fittings are versatile, efficient and built to last, cULus listed and always in stock. Our durable round covers, companion to our line of round outlet boxes are constructed with 1, 2 or 3 tapped holes and feature a weather seal gasket to prevent moisture damage. UL listed for use in wet locations, models feature 1/2 in knockouts and are available in gray, bronze or white.