Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for an 8,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes ... : 4,000 lbs Axle capacity: 8,000lbs Length from center of spring eye to center of spring eye (unloaded): 24-7/8" Spring width: 1-3/4" Eye diameter with bushing: 9/16" Eye diameter without