Labwork Single Trailer Axle Suspension Kit 3 leaves Trailer Double Eye 4000lbs

About LabworkLabwork is an Auto Parts One-Stop Solution brand of more than 10 years, which specializes in providing global customers with top-notched quality automotive parts & accessories . If you need any auto parts, its enough to come to Labwork. FeaturesSpring capacity: 2000 lbsAxle capacity: 4000 lbsLength from center of spring eye to center of spring eye (unloaded): 25-1/4"Free open: 3"Spring width: 1-3/4"Eye diameter with bushing: 9/16"Single leaf thickness: 5/16"Number of leaves: 3 FitmentFor 4000lbs Single Trailer Axle Suspension Kit - 3 leaves 2000lbs Trailer Double Eye Spring Package IncludesA variety of Sets for you to choose from:(The details are shown in the picture)Set 12*2000lbs-3 leaf spring (bushing)4*2-3/8" round shaft 5-1/2" long 1/2" diameter U-bolt with matching nut2* U-shaped bolt shaft plateSet 22*2000lbs-3 leaf spring (bushing)2* center hanger2* front and rear hangers4*2-3/8" round shaft 5-1/2" long 1/2" diameter U-bolt with matching nut2* U-shaped bolt shaft plate4* shackle belt6* shackle bolts and locking nuts4* bushingSet 32*2000lbs-3 leaf spring (bushing)2* center hanger2* front and rear hangers4* shackle belt6* shackle bolts and locking nuts4* bushingW/O Product Instruction Questions and answers1. What is the material of the leaf spring?A: 60Si2Mn spring steel, surface thickening spray treatment.2. Can only one spring be replaced?A: Of course you can, but we strongly recommend replacing both springs at the same time, because the spring will sag and elongate over time. If it refers to replacing one, it is likely to not match the spring on the other side, which may cause the trailer to lose its level imbalance and disrupt your layout.