#2045: 45mm SS Combustion Air Tube (per foot)$20.00 #2045: 45mm SS Combustion Air Tube (per foot) quantity Add to cart Description Description 45mm ID Flexible corrugated stainless combustion air tube for Wallas dedicated heater products. Related products Add to cart #3410: 3″ Warm Air Duct (per foot) $10.00 Add to cart #2027/367200: 10 Liter (2.6 Gallon) Fuel Tank with Diesel Fuel Tank Adapter $136.00 Add to cart #3425: 75mm Air Intake Grille/Scoop $125.00