Topaz carries a complete line of built to last, cULus listed Weatherproof electrical fittings fabricated for multiple commercial and residential applications. Our 4” Round, 4 Hole Extensions, companion to our round boxes expand cubic capacity while enabling a flush finish. Constructed from corrosion resistant copper free aluminum; UL approved for use in wet locations and complete with gaskets and mounting screws for easy installation. Available in gray; always in stock and guaranteed for life to ensure satisfaction. Point of purchase packaging promotes self merchandising and easy display.