Gastite® manufacture CSST. This is corrugated stainless steel tubing used for gas installation. The product is easier and faster to install than traditional copper methods. Due to it being lightweight it is therefore easy to transport. Gastite® has a patented all brass XR2 fitting, this offers a metal to metal seal with no gaskets or o-rings. Installed in one continuous length Gastite® requires no soldering or threading. Simply manipulated by hand the pipe routes easily through complex building structures, requiring only one fitting at each end.