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The Corrapol Bitumen Ridge measures 1000mm long by 43200mm wide, with 200mm of cover on each side. The cover is 875mm long when overlayed onto another ridge. The impregnated ridges are made from the same bitumen as the Corrugated Bitumen Roof Sheets. The Corrapol Bitumen Ridge is available in the same Green, Black, Red, and Brow colours as the roof sheets.