Expanded polypropylene (EPP) is a highly versatile closed cell foam that offers a unique range of properties including excellent energy absorption, multiple impact resistance, thermal insulation, water and chemical resistance, exceptionally high strength to weight ratio and 100% recyclability. For the M version (only the M237. M337 and M437) of Systainer3 there are 3 parts that are matched to each other. For the Systainer3 M237 1 frame is needed, for M337 2 frames and for the M437 3 frames.
Prices are indicative.