This is a soundproofing and vibration damping sheet for automobiles made by POWERWORKS. It is a heavy sheet used for road noise reduction and improvement of car audio acoustics. 【Size】 792mm x 457mm / per sheet, total 2 sheets I purchased this with the intention of installing it in my car, but I haven't had time, so I would appreciate it if someone could make use of it. Since it is new and unused, please refrain from returns after purchase.