Thank you for viewing! (*´꒳`*) This is a sponge sheet from Okayasu Rubber★ Toughlong ES5 Thickness: 10mm x 500mm x 500mm Made of a material with excellent heat and cold resistance, it demonstrates durability against the heat of summer and the cold of winter. It can be used as a building material for both indoor and outdoor use, as well as for filling gaps, cushioning, packing, and vibration and soundproofing★ Brand new and unopened★ Thank you very much. (*´꒳`*)