RACO Drawn Octagon Electrical Box - the perfect choice for your ceiling or wall lighting fixture installations! This electrical box is designed with your convenience and safety in mind. Measuring 4 inches by 4 inches with a depth of 2-1/8 inches, our octagon box provides ample space to house your electrical connections. With five 1/2 inch knockouts and four 3/4 inch knockouts,wiring your fixtures has never been easier.