They are the Air Springs With permanently Crimped Parts. Air Spring is a load-carrying component of an Air Suspension System used on machines, automobiles, foundries, steel/ alumina and other allied industries etc. The elastomer bellows is vulcanized as a reliable permanent combination of elastomers, reinforcing plies and embedded metal parts. They can provide highest degree of isolation to any type of vibration system which can be as low as 60 cycles per minute (1 Hertz).