The DuraTech 8 Class A Chimney Pipe Anchor Plate is used to attach DuraTech Chimney to zero-clearance or masonry fireplaces. Check with zero-clearance fireplace manufacturer to ensure DuraTech Chimney is approved for use on fireplace.Fuel Type: Coal, Gas, Oil, Wood Height: 2 Inner Diameter: 8 Material: Galvanized Steel Outer Diameter: 10 Pipe Class: Class A Pipe Shape: Round Style: Functional UL Listed: Yes Vent Construction: Double Wall Weight: 2.5