Marketing InformationThe Famco GBV globe vent is an economical gravity ventilator for use on residential, commercial and industrial applications. This vent is not rated for any forced exhaust applications. The Famco GBV features watertight construction and a low silhouette while offering positive draft for good airflow. Sizes 3 to 12 in will include an adjustable draw bolt collar that offers a secure fit, yet is easily removed when needed. Sizes larger than 12 in will include a fixed band and are not adjustable. Quality constructed from 28 to 24 gauge galvanized steel, depending on size. The Famco GBV Globe Vent comes for pipe sizes ranging from 3 to 18 in OD, see our specs sheet for more details. This product uses our FB, PB and SB round vent bases on certain applications requiring a mounting flange. The Famco GBV globe vent is manufactured by Famco in the United States and comes with a 1 year warranty against product defects and workmanship. If you have any questions about this product, please refer to the FAQs above or feel free to contact us.