This 4 octagonal fan box is designed for secure and efficient installation of ceiling fans. It features integrated cable straps for organized wiring, ensuring a clean and safe setup. With a depth of 1-1/2 and a cubic inch capacity of 15.0, it provides ample space for electrical connections.The PROSERIES 54151-FBRS is a 4-inch octagonal electrical box designed for fan installations. It has a depth of 1-1/2 inches and a volume of 15.0 cubic inches. The box includes cable straps for wire management.