TUFTEX Dual-wall 4'x8' Polycarbonate Panels | Underground Economy Tank and Supply (760)367-4000
Greenhouse Roofing Material - You've probably never heard about this material - YouTube
Ejoy 72 in. L x 27.5 in. W x 8 mm Thickness Corrugated Polycarbonate Plastic Clear Twin Wall Roofing Panel (Set of 1-Piece) 72x26TwinWall_1pc - The Home Depot