Soft (orange): 80-180 lbs / 35-85 kg
Medium (purple): 160-230 lbs / 70-105 kg
Hard (yellow): 200-270 lbs / 90-125 kg
Nipples are poured in our extremely high rebound Randy Urethane formula. We stumbled on this urethane a few years ago while testing ultra high rebound formulas for wheels, but we found this urethane to actually be too high rebound for a wheel urethane. Perfect for a bushing.