Air Vent 9 in. Adjustable Type B Gas Vent Cap- Pack of 12

Adjustable Type B Gas Vent Caps are available in 3 sizes to fit pipes ranging from 3 inches to 9 inches. Use these caps for LP and gas-fired appliances to prevent weather, debris and birds from entering the vent. Only a wrench and screwdriver are needed to quickly and easily install. Heavy-duty aluminum construction resists rust and corrosion.