New Kwikon Single Gang Concrete Wall Boxes arrive on the jobsite fully assembled and ready to install. Say goodbye to wasted energy and time spent wrapping and taping product in preparation of the concrete pour. A Kwikon Concrete Wall Box arrives fully assembled with the hubs, protective poly film and single gang opening all installation ready. Made of nonmetallic, non-conductive and noncorroding PVC, these fittings are durable, lightweight and highly engineered; perfect for the tough poured wall environment.