Fiberglass Wool Board It uses glass wool which adopts centrifugal way to produce boards and then finished by adding binder. It is good material for sounds- absorption and heat preservation. Density: 48kg/m3, 64kg/m3, 96kg/m3, 120kg/m3 Size: 0.61m(W) x 1.22m(L) or 1.22m(W) x 2.44m(L) Thickness: 15mm, 25mm, 50mm Note: The boards can be coated with perforation Al. foil, black fiberglass tissue,black fabric,craft paper or PVC film.