Shingle-Over Rolled Ridge Vent Provides continuous ventilation while keeping out nature's worst elements. Draws fresh air from soffit vents, exhausting hot, moist air through the ridge line to create a balanced ventilation system. Patented StormStop technology keeps out wind driven rain, snow, and dust without the need of a baffle. High-density polyethylene is virtually unbreakable; won't crack, curl, or expand. Gun nailable. Secure vent and cap shingle in 1 easy step with Quarrix's exclusive One Pass Installation. Adapts easily to pitches of 2-1/2 to 20/12. Foam end caps are included. Lifetime manufacturer warranty. Low profie. Size 9 x 20', Thickness 5/8 , Type Gun Nailable, Color Black, Net Free Area 13 sq inch per linear ft, Roof Pitch Size 2/12 to 20/12, Pkg Qty 1, Package Type Sleeve