US RoofVent is a 20 foot roll for use as intake or exhaust ventilation of roof decks with a pitch of 4/12 or greater. US RoofVent can be used anywhere on the roof deck where ventilation is required. Standard Price $59.00 ON SALE $53.00 Size: 20 feet Pieces: 1 Shipping: 14.95 Per Box Total Feet: 20