Double Sphere Threaded Flexible Rubber Expansion Joints are the choice when an economical threaded pipe connection is needed. Threaded Flexible Rubber Expansion Joint is engineered to absorb thermal movement, offset and misalignment in piping systems. Threaded Flexible Rubber Expansion Joint is an excellent choice to absorb and isolate vibration. They are made of neoprene and nylon and are resistant to ozone and aging. They also accommodate thermal movement and misalignment.Threaded Flexible Rubber Expansion Joints are used in a relatively small diameter pipe. The pressure is not too great. The price is cheaper, more affordable. Customers can choose according to their needs. It can be applied to the joint place of the pipe fitting of air-conditions in residence, hotel and so on.