... welcome Guitar tremolo spring 1.Extension spring's Material,carbon steel, spring steel ,stainless steel ,alloyetc.2.Extension spring's Wire Dia.,0 ... .ISO9001 certificate.4.We can do OEM.5.Extension spring's Surface treatment,Zinc,Nickel,silver,golden,tin,powder ... .6.Applications: Automotive, medical device, electronics, toy,etcThe Spring Works specializes in custom extension springs.All are formed on ...