This is a cut piece from a new product. It is Calmflex F-4 sponge. Size: 190 x 260 x 10 mm With adhesive tape on the back (strong adhesive, not reusable). The surface has a Meltom processed film and is a sound-absorbing material that suppresses mid-frequency sounds. Recommended for application on A-pillars, under the floor, and interior panels. Film-coated, excellent mid-frequency sound absorption. Flammability: UL-94 HBF Density: 23 kg/m3 Specified before surface film formation. *The above values are not guaranteed. [Examples of Calmflex series usage] Sound absorbing material for OA equipment, automobiles, construction machinery, etc. Inoac Calmflex F4-LF