Check the listing for details. (4) Trailer leaf spring kit for tandem 10k - 12k w/ u-bolts & hanger kit 3" axle. Condition: New. Listed at 243.95 USD. (4) Trailer leaf spring kit for tandem 10k - 12k w/ u-bolts & hanger kit 3" axle5,200 / 6,000 each axle 4 @ 2,900 -3,000 lb springs u-bolt kit10k - 12k Suspension kit and hanger kitIncludes 4 @ 2,900 - 3,000 lb - 5 - leaf springs 1 3/4" wide and 25 1/4" eye to eye centerAlso known as 5,200 lb and 6,000 lb per axleEye to eye springs and equalizer include nylon bushing already installed.U-bolt kit includes 8 @ 3" x 7" inside diameter round u-bolts (1/2" ) and nuts4 u-bolt axle plates2 equalizers, ( Overall length is 9" and height is 4 1/2" )2 center hangers, ( 2 1/2" tall ) to hole center4 front and rear hangers ( 1 1/2" tall ) to hole center8 shackles - 2.562" center to center14 shackle bolts 9/16" x 3" and lock nuts you will get what the picture shows.Professional Installation is Highly Recommended. (No Instruction Included)