The main design criteria include secure containment of the extinguisher combined with quick and easy access. To achieve the improved robustness and durability the cabinet is now rotationally moulded out of 5mm Microcene, a new polymer based Metallocene Technology. This material has excellent chemical and weather resistant properties together with being flame retardant and UV-stabilised. Both types are designed to contain up to 12kg capacity extinguishers with bottle diameters of 170-195mm and up to an overall height of 670mm. The extinguisher itself is retained within a triangular formation of two moulded-in runners and a self-adjusting bow spring. The base and rear has moulded returns and castellation to provide the strength together with an abundance of fixing/locating positions. A series of reinforced fixing holes, to line up with our standard brackets, are also available.