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.