Ridge vents are a type of attic exhaust vent that make up half of a balanced attic ventilation system for each roof. Intake vents make up the other half of the system. Together they help remove any built-up heat and moisture inside the attic for year-round ventilation. Ridge vents install at the peak to provide continuous exhaust airflow horizontally along the roof. Their low profile makes them nearly invisible from the ground. Use the Lowe's calculator to determine how many linear feet of ridge vents is needed per roof. 12-Inch-wide, 4-foot-long, plastic ridge vents on which matching shingles will be installed 18 Square inches of Net Free Area per linear foot of vent Internal weather filter provides weather protection; external wind baffle enhances airflow performance and provides weather protection Miami-Dade County approved Suitable for 3/12 to 16/12 roof pitch Part of a balanced attic ventilation system for year-round airflow Helps to fight heat and moisture buildup inside an attic as well as ice dams in cold climates Requires intake ventilation for proper performance Use the Lowe's online calculator below to determine how many exhaust vents and intake vents are needed depending on your attic size Color/Finish Family: Black Manufacturer Color/Finish: Black Series Name: ShingleVent II Type: Stick Length (Inches): 48.0 Weight (lbs.): 1.8 Width (Inches): 14.0 Filter Included: Yes For Use with RVs: No Material: Plastic Net Free Area (Sq. Inches): 18.0 Warranty: Limited lifetime CA Residents: Prop 65 Warning(s): No UNSPSC: 30161900