SuperSprings SSF-181-40-1 SumoSprings Maxim Front Airless Airbag Kit Designed to enhance load carrying ability, stabilize sway and improve overall driver control and comfort Provides progressive load control and compresses up to 80% of original height with full memory rebound "Airless airbag" design means no air leaks, air line or compressors Proprietary material provides softer engagement for enhanced comfort Built tough in the USA Get a smoother and comfortable ride Utilizing molecular foam Maintenance free suspension springs Levels load; reduces sway Leak proof/puncture proof