SPECIAL ORDER ITEM. Review Returns Policy before purchase. This B-vent adjustable roof flashing provides an effective transition between vent pipes and roofs, ensuring proper exhaust while protecting against the elements. It is designed for reliable ventilation in roofing systems and efficiently protects vents from rain and debris, maintaining seamless functionality of the HVAC system. This adjustable roof flashing is suitable for pitch roofs and measures 3 in in diameter, making it suitable for a variety of venting requirements.