This RAB Lighting BSF universal mounting bracket is an adapter that converts a trunnion lighting fixture to a 2 3/8 slip fitter type fixture. It supports a maximum of 40 lb. and a maximum effective projected area EPA of 0.2. It weighs 4.5 lb. and measures 5 5/8 x 5 1/2 x 3 3/4 inches/14.3 x 14 x 9.5 cm L x W x H . L is length, the horizontal distance from left to right W is width, the horizontal distance from front to back H is height, the vertical distance from bottom to top. This universal mounting bracket is suitable for use with trunnion lighting fixtures and slip fitter mounting brackets.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?BSF universal bracketHardware