- Inner Diameter (Bottom): 5-3/8 in
- Inner Diameter (Top): 5-1/2 in
- Length: 16 in
- Manufacturer #: 901937
- Outer Diameter (Bottom): 8-3/8 in
- Outer Diameter (Top): 8-1/2 in
- Specifications: For External Use
- Suitable For Use With: RG1-RG7, RO1, M5SB, MG1E Furnaces
- Type: Flue Extension
External flue extension is used to provide additional clearance between the flue and roof - especially useful in areas that receive heavy snowfall.