The profiles of Shadowline Corro Hip and Valley are stretched in length and shape to suit the calculated pitch. It comes in sheet lengths plus one profile for sheet-to-sheet adjustment. The flashing sits in the shadow of the ridgecap on the hip, and is not visible against the colour of the roof sheet. Order equal amounts of right and left flashing for each application, both hip and valley. Order Standard Shadowline for common or straight ridge to keep uniformity. Standard Shadowline has no right or left.