Four-stage anti-corrosion treatment: deep degreasing, phosphating, priming, hot powder spraying. It has a removable type top grid. Manufactured with high frequency welding. Trauma-resistant edges. Hygienic, i.e. designed for rooms with hygienic standards and regulations. Devices can be installed on either side, as there are no strips defining the back side. Operationally reliable. High degree of environmental friendliness.