BEL CSO 40/S4927 - 1 Bel BA13 - GW80
Sound absorption ceiling with 1 x 12,5 mm PregyBel board fixed to galvanized steel frame made of 28-28-28 mm U tracks and 27-49-27 mm S4927 channel at 40 or 60 cm spacing with hangers at 120 cm. 80 mm glass wool in the cavity.