VEVOR 5 Pack Polycarbonate Greenhouse Panels 2' X 4' X 0.32'' Roof SheetsProduct Features 80% Light Transmission With 80% transparency, these roof panels allow ample light while blocking 98% of UV rays, preventing overheating and supporting stable, plant friendly temperatures year round. Durable Construction Heavy duty double layer honeycomb design with a weight of 0. 6 kg m_ and 0. 32 inch thickness resists damage from hail and heavy falling objects, ensuring long lasting protection. High & Low Temperature Resistant