Features:
- Dark Blue 180-310 Lbs +1400 Engagement
- Black/blue 160-270 Lbs +1200 Engagement
- Silver/black 140-210 Lbs +1000 Engagement
- Silver/blue 100-190 Lbs +500 Engagement
- Silver/black/white 35-212 Lbs Std Engagement Around 2000 Rpm On Ramp Side A ( Ramp Side B Is Typically About 1000-1200 Rpm Higher Than A For All Springs But Will Vary With Arm Weight Configurations)