CEILING/WALL RND SMRT BX *Brand Name: Madison Electric *Sub Brand: Smart Box *Shape: Round *Material: PVC *Number of Gangs: 1 gang *Product Type: Ceiling Box *Color: Gray *Height: 4 in. *UL Listed: Yes *Number of Knockouts: 6 *CSA Listed: No *Number in Package: 1 pk *Application: Mounting smoke and carbon monoxide detectors and light fixtures *Packaging Type: Boxed *Box Type: Ceiling/Wall *Discovery ACC, NBR, SUP