BrassCraft CSSD44R-18 P Safety PLUS Gas Appliance Connector with 1/2" OD EFV and 1/2" MIP x 1/2" MIP x 18" 3/8 In. ID (1/2 In. OD) x 18 In. corrugated stainless steel with corrosion resistant coating Safety+PLUS Excess Flow Valve helps protect against gas fires and explosions - 1/2 In. MIP 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