Ceiling electrical box for use in old work applications. Features flanged configuration with adjustable tabs for mounting into existing structures. Equipped with living hinges for additional cable support. Polycarbonate construction for additional durability will not rust or corrode. Includes mounting ears and two swing clamps for easy installation. Not intended for fixture or support in ceilings houses an installed ceiling switch or receptacle. UL (Underwriter s Laboratories) classified for 2-hour fire wall & ceiling (UL263 2 HR W C). UL listed to UL514C. Support Rating: 6 Lb. Material: PVC Construction: Molded Mount Type: Nail-On Width: 4.25 In. Height: 4.25 In. Depth: Volume: 18 Cu. In. Metallic/Non-Metallic: Non-Metallic Shape: Round Color: Gray Certification: UL Listed WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. -