The FAMCO J Vent with Extension – Painted, also referred to as the JVXP Roof Vent, is designed to be used on any roofing material. It provides a low silhouette and is open on two sides for better air flow. It’s specifically designed to help eliminate moisture and heat buildup. This roof vent works best when used with soffit or gable end venting. The FAMCO JVXP is fabricated from 28 gauge galvanized steel and features a bottom 3″ stem for a flex pipe connection and features a ⅛ inch screen. It comes in 4 inch, 6 inch, 7 inch, and 8 inch variants and is available in black or brown pre-painted steel. The FAMCO JVXP Roof Vent is manufactured in the USA by FAMCO and features a 1-year warranty against product defects and workmanship. To find answers to your questions about this vent, you can refer to the FAQs above or contact us by phone or email.