This can be a kit to switch the entire “wear portions” on a typical tandem axle trailer (4,000 # GVW as much as 14,000# GVW) . That is for usual “Eye to Eye ” Springs, now not “slipper” springs (bolt on one end of spring best), For usual 1 3/4″ wide springs.
Includes all wear portions on a typical tandem axle trailer
Equalizer hole center to hole center is 5-5/8″
Shackles are 2.6″ on center
Outer Hangers are 2.3″ Tall
Inner Hangers are 3.6″ Tall