SELKIRK CORP 104400 4-Inch  Support Assembly
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<b>[Product Information]</b><br>
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<li>4" inch, 4RV-GVS, Support Assembly, Round, Type B, Gas Vent</li>
<li>Support Plate should be installed above the joist</li>
<li>Support plate also serves as a firestop</li>
<li>Will support a maximum of 60' of gas vent</li>
<li>RV line of MetalBest round Type B gas vent pipe and fittings is designed for use on approved gas appliances</li>
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