Product Type Venting For Gas Heaters, Compatible with Product Type Dayton Infrared Tube Heaters, Opening Height 6 in, Opening Width 6 in, Mounting Type Flange-Mount, Vent Direction Horizontal, Vent Length 29 in, Vent Diameter 6 in, Vent Size 6 in, Vent Type Dual Sidewall Venting, Material Galvanized Steel, Outer Diameter 6 in, Overall Length 29 in, Includes 18 in B Vent and B to C Adapter, 6 in Side Wall Vent Cap, 6 in Wall Thimble, Standards UL Listed