... 3,material:PP or PE 4,OEM & DIY sheet for warning sign PP poster board 1, specifications: SpecificationsPolypropylene corrugated sheet made from ... virgin raw materialsRegular RangeThickness2, 3, 4,5, 6, 8, 9, & 10 mmWidth<1650mmLengthany length is okColoursYellow, White, Blue, Grey, Green, Red ... mass production4,detailed or related picture: Corrugated sheet for printing warning sign PP poster board