ST-type slotted gratings for sound insulation and air exchange are designed for use in building partitions separating spaces that require pressure equalization.

ST gratings are made of galvanized steel and powder painted in white RAL 9010. Powder painting in other RAL colors is available on request. The inside of the grille is covered with mineral wool to provide sound insulation. Typically, the slotted grille is equipped with a telescopic flange, which allows it to be installed in building partitions with a thickness of 95 to 145 mm.