Straight fittings connect the flexible gas piping to gas supply, distribution manifolds or gas appliances. Copper Compression fittings connect the flexible gas pipe directly to copper pipework. Tee fittings create a branch line on tubing runs. Couplings allow for the splicings and additions to the flexible gas piping. Metal-to-metal seal with no split rings, O-rings or gaskets. Self guiding assembly to ensure a perfectly even flare. Exclusive, patented Jacket-Lock, fitting elimates exposed stainless steel beyond the nut. All components are fully re-usable.