a standard stratocaster has 3 springs.... kung .010s ang gauge mo, it should have at least 3. you can purchase one at rj, audiophile , jb, lazer.....
all my strats have 5 springs... medyo heavy kasi ako mag gauge .011s or kung may stock, .012s...
kung dehins ka naman gumagamit ng tremolo that often, i suggest punuin mo ng springs yan... less hasel pa....