Both inner and outer layers made from corrosion-resistant 316L stainless steel. 904L stainless steel is also available as an option for the extreme conditions found with appliances like slumbering stoves.
Corrugated outer skin for high crush resistance.
Extra smooth inner skin allows for easy drain down of condensates, less opportunity for soot to collect in the joint area and ease of sweeping.
Engineered joint design gives extra strength and flexibility.
Inner skin remains smooth and protective even after the rigours of installation.