This is the Associated optional front spring set, compatible with most of the Team Associated trucks. These springs fit onto the shock absorbers. Five varieties of spring rates represented by different colors.
Two red 3.90 lb. springs (#ASC7430)
Two gold 3.70 lb. springs (#ASC7425)
Two blue 3.45 lb. springs (#ASC7429)
Two silver 3.225 lb. springs (#ASC7428)
Two green 2.99 lb. springs (#ASC7427)
The remainder of the front truck shocks.