GMT hollow springs are among other things used for bearing and structure-borne noise insulation in equipment manufacture and terotechnology. They have vibration-insulating as well as shock-absorbing characteristics, which are also used in many different ways in the fields of vehicle construction and mechanical engineering. The range of application for these spring elements are, for example, skid or landing gear springing in aircraft construction, in whlrlers and jolters, for the separation of vibrating masses, as a shock protector in vehicle construction or as an ejector in blanking coining and punching dies