The Lippert Equa-Flex Rubberized Equalizer helps give you a smoother, more comfortable ride when you're towing your RV. This kit dramatically reduces fore-to-aft trailer movement, otherwise known as chucking, and it helps eliminate trailer and cargo damage caused by road shock and vibration. Designed for tandem axle trailers with double-eye leaf springs, this patented trailer equalizer delivers a ride as smooth as torsion axles at a fraction of the cost. This kit comes with 2 Equa-Flex sub-units with pre-installed bronze bushings. The Equa-Flex is available for weight capacities ranging from 3, 500 to 5, 200 lbs.• Rubberized design intended for tandem-axle trailers• Dramatically reduces fore-to-aft trailer movement• Designed for double-eye leaf springs and weight capacity from 3, 500 to 5, 200 lbs.• Scored 7.5 out of 10 in independent testing, compared to 5.0 by leading competitor• Includes two Equa-Flex sub-units• Each sub-unit comes with pre-installed bronze bushings• Center hanger and other mounting hardware sold separately Delivers a ride as smooth as torsion axles at a fraction of the cost For double-eye leaf springs & weight capacity from 3, 500 to 5, 200 lbs. Comes with 2 sub-units with pre-installed bronze bushings | Lippert Equa-Flex Rubberized Equalizer Tandem Axle Kit, Wide Stance, 3,500-5,200 lbs