... material Approved by ISO9001:2000 UV protection Force structure multi-wall Polycarbonate sheet (1) Specifications1). Thickness: 4mm, 5mm, 6mm, 8mm, ... 2) Product Features Generally speaking, Compared to twin-wall sheet, multi-wall sheet has the features of higher shock resistence and heat ... Walkways f). Carportsg). Natatorium h). Greenhouse coverings. Force structure multi-wall polycarbonate sheet