Shallow ceiling fan outlet box with mounting screws. 1 integral clamp. Non-conductive high impact lightweight PVC. 5 knock outs, 8 cu-in capacity. For new work or renovations. Mounts ceiling fan securely to the ceiling joist. Rated for fans up to 35 lb and fixture up to 50 lb. 4 in Dia x 5/8 in D. UL listed.