... .25mm;4.Tubing:304 stainless steel(VARIOUS COATING IS AVAILABLE); 5.Flare nuts:stainless steel; Brass Nuts6.Adapters Material:stainless steel; brass7.Temperature:-196°C ... % factory gas leak tested;10.High flexibility, withstands corrosion, durable, reliable, safe, and withstands high and low temperatures;11. ... ,North American,Mid East,East Europe,West Europe . Stainless Steel CSA Flexible Gas Connector