These high quality U bolt clamps can be made of galvanized steel or 100% stainless steel, they are suitable for use with a wide range of pipe diameters , and not only ideal for car exhaust system, TV aerial masts, road designs, but many other pipelines required of medium pressure and low pressure with oil, water and gas as medium in the mechanical hydraulic systems of metallurgy, oceaneering, ship-making, chemistry, petroleum, engineering machinery, etc.