40 L x 3 W x .447

Patented roller and shackle system allows suspension support to kick in and level vehicle only when needed so you enjoy a smooth ride whether loaded or unloaded. Never needs adjusting or maintenance. Easy installation that requires no drilling. Anti-sway feature increases handling stability. Perfect for the weekend towing vehicle. Available to fit most popular pickups, vans, and SUVs. Mounting kit (sold separately) required for axles below factory springs. 2 per box.