Type B Gas Vent, Double Wall, Round
12 Inch
Aluminum (Inner Wall), G90 Galvanized Steel (Outer Wall)
4 Inch I.D. x 4.5 Inch O.D.
0.012 Inch (Inner Wall), 0.018 Inch (Outer Wall)
Lock Ring
400 Deg F
UL 441
Installation Instructions are Supplied with Cap and Support
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