Exhaust vent for roof ridge allows heat and moisture to escape and helps resist snow infiltration in harsh winter weather. It provides 18 sq-in per ft of net-free ventilating area. The unique EasyTear sizing feature allows you to hand-tear product in 3 in increments - no knives necessary and less waste. Product Details Color:Black Height:10.5 in Length:4 in Material:Polypropylene Net Free Ventilating Area:18 sq-in/ft Roof Pitch:3 12 to 16 12 Suitable for:Roof Ridge Width:13.7 in Features Allows heat and moisture to escape at the most effective location the ridge Helps resist snow infiltration in harsh winter weather