... -insulated: The spatial structure and gathers the carbonic either resin to have the good sound-insulated characteristic, can reduce ... ,30000mm,6000mmThickness:from 1.2mm to 16mmMaterial: makrolon pc resin for Bayer ,Germany Note: special specification and color can be ... exposed to extreme weather for a long time.6, Sound Insulation The hollow from and polycarbonate resin offer significant advantage ...