Product Type Duct Adapter, Compatible with Product Type Indirect-Fired Portable Oil & Kerosene Torpedo Heaters, Compatible Grainger Part Number 5PFW8, Compatible Mfr. Model Number HVF110, Overall Length 8 in, Overall Diameter 13 in, Vent Diameter 12 in, Thickness 0.03 in, Maximum Operating Temperature 350 Degrees F, Material Steel