Extremely robust, dustproof, waterproof, temperature stable, stackable - the external cases have everything needed to battle nature with strength. This is ensured, among other things, by the extremely stable polypropylene (PP) material from which the external cases are made. In order to make the case as stable and secure as possible, the design and all individual functions have been developed over the years and have been tested again and again. Thus, we can give a full guarantee for our outdoor case series without a guilty conscience.