pvc welidng screens with four colours red,yellow,green,blue self extinguishing Grades :Ribbed ,SmoothSizes range : 200mm*2mm*50m ,200mm*3mm*50m 300mm*2mm*50m ,300mm*3mm*50m 400mm*4mm*50mColour range : Yellow,Black,Green,Black,Red,White,Grey,Orange ,No colourFeature :The transparent,Heat preservation,Blocks breeze,Dust palliative,Economyenergy,Defend highlight,Defend ultraviolet,Sound insulation , ...