Brand Name: Selkirk
*Diameter: 3 in.
*Material: Galvanized Steel
*Product Type: Wall Thimble
*Chimney Vent Type: Type B
*Vent Type: Type B
*Adjustable: Yes
*UL Listed: Yes
*Number: 3RV- WT
*Maximum Temperature: 550 deg. F
*Width: 3 in.
*Gauge: 28 Ga.