Fender Tremolo Tension Spring (6-Pack) Part #0018671049 It's never been easier to replace missing or damaged tremolo springs on your guitar than with genuine Fender Stratocaster guitar tremolo tension springs This 6-pack includes black-plated steel springs, which are used on most American Series, American Deluxe and American Standard Stratocaster guitars from 1986 to today It's never been easier to replace missing or damaged tremolo springs on your guitar than with genuine Fender Stratocaster guitar tremolo tension springs This 6-pack includes black-plated steel springs, which are used on most American Series, American Deluxe and American Standard Stratocaster guitars from 1986 to today