All Jones Stephens gas connectors have quality flared end fittings which create a metal to metal seal and are 100% leak tested to ensure safety and quality.5/8" OD (1/2" ID) Gas Connector, 3/4" FIP x 3/4" FIP Ball Valve x 24" The flexible hoses are made of durable 304 stainless steel and end fittings are plated for high corrosion resistance.