input: [0] Stainless Steel [2] McMaster.com probably would have some 304 alloy or 316 alloy also it is used as a mig welding wire welding. Aircraftspruce.com sells safety wire made by malin co. [3] very springy [1] 
output: This is very Firm so if you work with it you need to work thin, or get some "safety wire" which is annealed stainless