Materials SMC moulded (fibreglass) - grey RAL 7040 color. Characteristics Dome shaped removable cover with coulisse sliding attachment; closure by means of triangular imprint key. Lower fairlead made of flexible thermoplastic material. Internal aeration obtained by means of labyrinth on cover perimeter. Measurement unit fixed by means of bottom plate (to be ordered separately). Protection degree IP43 in compliance with CEI EN 60529; IK 10 according to CEI EN 62262.