Clihome Greenhouse 6.2-ft L x 4.3-ft W x 6.8-ft H Green Greenhouse Kit in the Greenhouses department at Lowes.com
4 mm & 6 mm Twin-Wall Polycarbonate Sheets - Clear - FarmTek
Ejoy 48 in. L x 28 in. W x 0.16 in.Thickness Corrugated Polycarbonate Plastic Clear Twin Wall Roofing Panel (Set of 12-Piece) TwinWall_TWPSC48x24_4mm_12pc - The Home Depot
Amazon.com : 2' X 4' 14 Pcs Polycarbonate Greenhouse Panels 4mm-Thickness Twin-Walled Polycarbonate Sheets, Clear, Waterproof and UV-Protected Shatterproof Board, Panels for Outdoor, Plant Stand Roof, Greenhouse : Patio, Lawn & Garden