... a groove in the middle of the panel Product namebuilding material for ceiling and wallMaterialsPVC resin ,calcium carbonate.etcBrand NameYayuanshiSpecificationWidth10cm~60cmThickness4.5mm~15mmLengthaccording ... , corrosion resistance, mildew proof, good insulation environmental friendlyServiceOffer OEM,Certificate of Original, SGS ,SONCAPColors and patternsVarious.Your designs can also be ...