- Features a branch and/or base with a smaller diameter than the trunk size
- Suitable for use with Type B gas vent
- Round shape
- Material thickness of 0.18 in galvanized steel, 0.12 in aluminum alloy
- Dimensions: 9 in L
- Duct Shape: Round
- Finish: Galvanized
- Material: Aluminum/Steel
- Nominal Size: 4-1/2 x 3-1/2 x 4-1/2 in
- Suitable for: Gas Vent
- Temperature Rating: 470