Slab box, Standard, KWIKON®, With molded connector, PVC, 44 cubic inch. Approved for support of ceiling fans up to 35 lbs and luminaries up to 50 lbs. Concrete-tight. All molded connectors have 360° locking tabs that exceed CSA requirements for pull-out. Manufactured from high-impact PVC. Non-metallic/non-conducting/non-corroding. Threaded brass inserts, Supplied as a fully assembled one piece unit.