2540-01-618-5339 Vehicular Insulation Panel. Made by BAE Land Systems, p/n 4323988. This is a very dense foam rubber pad used on military vehicles. Approx. 144 square inches, could be cut and used anywhere you’re addressing a need to dampen mobile electronics, or cover a sharp edge, squeak or rattle. Original invoice on this piece is $25.60, Get it here and save some money. 15338 L5A3, T1