American Gas Lamp Works 12' x 3" OD Fluted Aluminum Residential Post 32in 03" Height 1

03" Height 1

Diameter 13" Height 2

Napoleon GD430 Freedom Flex 10 Feet Vent Kit for 5 Inch x 8 Inch Flexible Direct Vent

The outer diameter of the collar is 1/8" smaller than the inner diameter of the chimney

American Gas Lamp Works 12' x 3" OD Fluted Aluminum Residential Post 32in 03" Height 1American Gas Lamp Works Fluted Aluminum Residential Post with 3" Outside Diameter is available in 7'9", 9', 10', and 12' lengths. American Gas Lamp Works manufactures and sells the worlds finest natural gas and liquid propane lighting fixtures and accessories, as well as matching electric incandescent and LED fixtures. Whereas nearly all other gas lanterns are made from bent and soldered sheet metal, American Gas Lamp Works lamps are handcrafted from