Shallow ceiling fan outlet box with mounting screws. 1 in tegral clamp. Non-conductive high impact lightweight PVC. 5 knock outs, 8 cubic inch capacity. For new work or renovations. Mounts ceiling fan securely to the ceiling joist. Rated for fans up to 35pounds and fixture up to 50 pounds. 4 in diameter x 5/8 in depth. UL Listed.