#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 #5430: Cold Air Inlet Vent $12.00 Add to cart #2467: Exhaust Vent (thru hull duplex) $167.00 Add to cart #3421: Warm Air Grille (75mm) $53.00