This is the Integy 40-Piece Progressive Spring Set for the Traxxas T-Maxx .15, 2.5, 2.5R, 3.3, and E-Maxx trucks. There are 40 springs included for a total of 5 complete spring sets. These spring sets will allow you to better tune your truck's suspension, while also giving it a new look. The springs are designed to work with the stock shocks, for a fast, easy installation.
Features: Soft, Medium, Hard, Extra Hard, Super Hard springs (Blue, Purple, Red, Brown, Green)
Specifcations:Length: 3" (76mm)Diameter: 3/4" (19mm)Number of Coils:8-Green (super hard)9-Brown (extra hard)10-Red (hard)11-Purple (medium)12-Blue (soft)