... by ISO9001:2000 UV protection Force structure multi-wall Polycarbonate sheet (1) Specifications1). Thickness: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm. ... (2) Product Features Generally speaking, Compared to twin-wall sheet, multi-wall sheet has the features of higher shock resistence and heat ... f). Carportsg). Natatorium h). Greenhouse coverings. Force structure multi-wall polycarbonate sheet