125,000BTU (36,634)W Durable stainless steel 304 material Corrugation extends all the way to the fitting for increased tubing flexibility Quality flared end fittings create a metal-to-metal seal in critical applications CSA Design certified domestically and internationally for indoor and outdoor use ANSI Z21.24-2015/CSA 6.10-2015 and ANSI Z21.75-2016/CSA 6.27-2016.