Gastitea® Corrugated Stainless Steel Tubing (CSST) supplies natural gas or LP gas to appliances. Gastite is a reliable, cost-effective system that can be installed in all modes of construction. Flexibility means quick and easy installations: Gastitea® installs 30-70% faster than traditional piping methods.Features: Flexibility and durability allows for simple routing through complex building structures and designs. Pre-marked by the foot for easy measuring and installation. Minimum tubing wall thickness of .010 on all sizes is more robust than other brands of CSST. Annealed 304 stainless steel makes tubing more flexible than brands not heat-treated. Tubing: ASTM A240 Type 304 Stainless Steel. Jacket: UV resistant Polyethylene complying with requirements of ASTM E84 25/50 Index for Flame and Smoke. CSA: ANSI LC 1 "Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing" IAPMO: International Association of Plumbing & Mechanical Officials - File No. C-3250 ICC: International Code Council - Evaluation Report No. PMG 1019