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-inhibiting treatment in the bracket fastening screw zone by means of sleeve in RAL 7035 grey coloured thermoplastic material. Polyurethane foam seal able to withstand the weather conditions and UV solar radiation. Characteristics For 38 x 132 hatches with semi-rounded ends. Bracket fastening screws with special hemispherical triangular shaped heads and semi-rounded sides (trademark application pending), tightened with the special supplied key. Polyurethane foam seal able to withstand the weather conditions and UV solar radiation. Protection degree IP 54 in compliance with CEI EN 60529, IK 10 according to CEI EN 62262.