Falken Design 48 in. W x 96 in. L x 0.3125 in. T (8 mm) Clear Twin Wall Polycarbonate Sheet MW-CL-3-8/4896 - The Home Depot
Ejoy 48 in. L x 24 in. W x 0.31 in.Thickness Corrugated Polycarbonate Plastic Clear Twin Wall Roofing Panel (Set of 24-Piece) TwinWall_TWPSC48x24_8mm_24pc - The Home Depot
Amazon.com: Pack of 2 H CONNECTORS Clear (Pack of 2) 72'' Long 8mm 5/16 Thickness for LEXAN - Polycarbonate TWINWALL Sheets/BILLION RESOURCES : Electronics