This RAB Lighting CU4W white, weatherproof four hole universal cover is made of aluminum and is suitable for use with up to four 1/2 male threaded light fixtures. It measures 4 3/4 x 4 5/8 inches/12 x 11.7 cm H x W . H is height, the vertical distance from bottom to top W is width, the horizontal distance from left to right. It includes brass screws for mounting, and a 1/8 closed cell foam rubber gasket for a weatherproof seal. This universal cover is Underwriters Laboratories UL listed as suitable for use in wet locations. It can be used in a wide range of commercial, industrial, and home lighting applications.RAB Lighting manufactures LED, metal halide, and high pressure sodium lighting fixtures and controls for indoor and outdoor applications. The company, founded in 1946, is headquartered in Northvale, NJ.What s in the Box?CU4W white universal coverFoam covered gasketHardware