Southwire - Topaz line of vaporproof fixtures help job sites maintain illumination for safety and performance in all types of inclement weather. Our ceiling, pendant and wall mount fixtures with protective cages feature copper-free aluminum construction for optimum durability and reliability in an easy to install and accessible design. Thread sizes from 1/2 in to 3/4 in, all fixtures meet cULus rigorous standards. Point of purchase packaging promotes self merchandising and easy display.