The DuraTech 7 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.For class a chimney pipeADA Compliant: No Collection: DuraTech Fuel Type: Coal, Gas, Oil, Wood Height: 2 Inner Diameter: 7 Length: 11 Material: Galvanized Steel Outer Diameter: 9 Pipe Class: Class A Pipe Shape: Round Style: Functional Vent Construction: Double Wall Weight: 2.5 Width: 11