- Provides a cover for rough wall openings and serves as a firestop
- The vent collar provides a cover for a rough wall opening
- Fits double-wall pipe only
- Round shape
- Dimensions: 9-1/8 in ID x 16-7/8 in OD
- Finish: Galvanized
- Installation Type: Wall
- Material: Steel
- Material Gauge: 0.018
- Roof Pitch: 1/12
- Suitable for: Type B Gas Vent
- Vent Hole Size: 8 in