Available in one-way or two-way styles
SUPER Heavy duty PVC plastic for long life
NEW Design meets 1-300 National Venting Code. PREVENT rated at 144 square inches of venting area per unit.
Exclusive one-way valve design to prevent moisture from re-entering the roof system
Special insect resistant wire screen standard
Strong cap permanently attached vandal proof
Pre-drilled flange for fastening to roof deck
Handsome white finish