Materials Cover plate in die-cast UNI EN 1706 AC - 46100 DF aluminium alloy with rounded shape and edges. Minimum thickness 2.5 mm. Surfaces subjected to metal grit blasting treatment. Bracket fastening made of AISI 304 stainless steel. Rust prevention in the part where the bracket fastening screws turns, with thermoplastic sleeve. Polyurethane foam seal able to withstand the weather conditions and UV solar radiation. Characteristics For 45 x 186 hatches with semi-rounded ends. Used with MVV - MGN - MGV insulation (for diameters of more than 133 mm) series junction boxes with double insulation. Bracket fastening screws with special hemispherical triangular shaped heads and semi-rounded sides (trademark application pending), tightened with the special supplied key. Protection degree IP 54 in compliance with CEI EN 60529, IK 10 according to CEI EN 62262.