AmeriVent 5EF Roof Vent Flashing, 5"Highlights: Size: 5" Standard flashing fits flat to 5 12 pitch roofs Double seamed construction for protection from leakage For a standard flashing with a 6" skirt, the Model No. reads the size and EFFU or RFFU Flashing steep pitch the flashing with a steep pitch fits 6 12 to 12 12 pitch roofs Flashing tall cone the flashing with a tall cone fits flat to 1 12 roofs, and is used on flat roofs in snowpacked areas to reduce pressure