Powerbase is a rigid, load spreading panel. It is manufactured from 100% ARPRO™ Expanded Polypropylene. This Code 5 PP is the same 100% non toxic material as Tupperware; there’s no leaching, off-gassing or contaminants. The material is fully recyclable and re-usable. The panels, with an in-molded self locking system, are manufactured through steam chest moulding.