Copper 45 Degree Elbow has one or two of its size 45 Degree/not equal in size. 45 Degree elbows are used when the flow of air conditioning gases needs to be limited to a short pipe. Our Copper 45 Degree Elbow Fittings key features include features like Number Of Radius Options Available, Controlling The Direction Flow Of Gas, Used in Central Medical Gas Pipeline Systems, etc.