Kaiser Plastic® Corrugated Sheet, Xtra Strong (PC), Smooth and Clear, Trapezoid, 76/18-1 mm Thickness, 90 x 120 cm, Set of 1, Made in Germany : Amazon.co.uk: DIY & Tools
Adjustable Ridge for use with 3" Profile PVC Corrugated Roof Sheets
Edge Building Products - CSA
Force 25mm Opal Multiwall Polycarbonate Roof Sheet from £36.61