This is an Integy Complete Progressive Spring Set for the HPI Savage MSR4 and MSR5 shocks from Integy.  As you can see in the picture, these look awesome.  These allow great adjustability, for increased performance, handling, and if you are a racer, this can lead to faster times.  Included are 40 springs.  There are eight springs of five weights, ranging from extra soft to extra hard.  They are in several colors as well.  These are a must for a serious Savage owner.

FEATURES: Soft, Medium, Hard, Extra Hard, Super Hard springs (Blue, Purple, Red, Brown, Green)

INCLUDES: Forty springs in all (8 of each)

REQUIRES: Installing on MSR4 or MSR5 shocks

SPECS:
Length: 5-1/2" (140mm)
Diameter: 0.61" (15.5mm)

Number of Coils:
12-Blue (soft)
11-Purple (medium)
10-Red (hard)
9-Brown (extra hard)
8-Green (super hard)