What is This? The barb hose fitting connector is commonly used to connect lines for air, water, fuel and gas in a quick and simple way.Is there any advantages of the product? Made of 304 stainless steel, with high strength and corrosion resistance.How to use it? The barb end creates a tight seal on the flexible and semi-rigid tubes when used with a pipe clamp.What should I notice? Before ordering, please confirm the right size.