1)strong sound sbsorption 2)keep warm 3)high temperature resistant 4)easy installation and adjustment. 5)wall decoration. namemulti-functional polyester acoustic boardbrand YR-1101maetrial 100%PET or 4080weight 1000g/m2-3000g/m2 thickness 5mm-18mm color white,black,green,blue ,beige,or customize. packing inner polybag,outside cartons or customize MOQ2 tons per colorapplication car ,KTV, ...