National Manufacturing Week Booth #3330 Micro Miniature Electrodeposited Nickel Bellows have diameters as small as 0.02 in. and are dynamically flexible. The micro bellows can bend, compress, cycle, and are helium leak-tight. They can be used as miniature flexible micro-couplings, micro-hermetic seals, pressure responsive devices, aneroids, electrical contacts, or precision micro springs.