Slab box with molded connectors. Approved for support of ceiling fans up to 35 lbs. and luminaries up to 50 lbs. Concrete-tight. Corner and traditional mounting tabs offer contractors two options when installing to the slab deck. Angled design guides the nail into position within the trim cover area. All molded connectors have 360° locking tabs that exceed UL and CSA requirements for pull-out. Manufactured from high-impact PVC. Nonmetallic/non-conducting/non-corroding. Threaded brass inserts. Supplied as a fully assembled one piece unit.