Corrugated plastic lawn sign: 1.Material :PP 2.Printing:Silk screen printing. 3.Thickness:2mm-12mm 4.Weight:250-2400gsm Plastic sign board:PP (Polypropylene) Hollow Sheet is a kind of packing material that high strength and durable,but light weight. It can be recycled and reused repeatedly, and no pollution to environment. It can be made into box, bin, divider, and other customized shapes, which ...