BrassCraft CSSD104R-72 X Gas Appliance Connector 3/8 in. Id (1/2 in. Od) x 72 in. Corrugated stainless steel with corrosion resistant coating Safety+plus excess flow valve helps protect against gas fires and explosions - 1/2 in. Female flare connection to gas supply or gas ball valve Approved for indoor and outdoor use. 100% leak tested Use with natural, manufactured, mixed and liquefied petroleum (lp or propane) gases and lp gas-air mixtures Csa certified. Designed, machined & assembled in the USA