Ppgi coil: 1)Fireproof,heat preservation 2)Sound isolation and duration ... cars, dashboard, console shell, trams, trains ceilings, partitions, wall, door, car within the apparatus, coffee table, steamer compartment panels, furniture board ... cars, dashboard, console shell, trams, trains ceilings, partitions, wall, door, car within the apparatus, coffee table, steamer compartment panels, furniture board ...