DuraVent 4BVFS 4 in. Round Type B Vent Firestop

<p>This Aluminum Firestop Spacer with 4 Inch Inner Diameter from the Round Gas Vent series is a Type B gas component and consists of the duralock system for a tight seal. Use at every ceiling level where Square Firestop Support is not used. </p><b>Features</b><ul><li>Double Wall Construction</li><li>Use at Every Ceiling Level where Square Firestop Support is not Used</li><li>UL Listed</li></ul><b>Specifications</b><ul><li><b>Collection:</b> Round Gas Vent</li><li><b>Inner Pipe Gauge:</b> 28</li><li><b>Length:</b> 8.75"</li><li><b>Outer Pipe Gauge:</b> 28</li><li><b>Pipe Inside Diameter:</b> 4"</li><li><b>Width:</b> 6.75"</li><li><b>Configuration:</b> Shield</li><li><b>Inner Pipe Material:</b> Aluminum</li><li><b>Material:</b> Aluminum</li><li><b>Outer Pipe Material:</b> Galvanized Steel</li><li><b>Pipe Class:</b> Type B</li><li><b>Pipe Shape:</b> Round</li><li><b>Vent Construction:</b> Double Wall</li><li><b>Fuel Type:</b> Gas</li><li><b>Approved for Commercial Use:</b> No</li><li><b>Certifications:</b> UL</li></ul>- SKU: LIND4719