https://www.zytrailerparts.com/products/swing-arm-trailer-suspension/ Swing Arm Trailer Suspension Round axle suspension hanger thickness 6mm, 8mm, 10mm. The equalizer pin has 50mm,60mm, and 70mm types with steel and cooper bush. This has different modles. Custom trailer suspension with kits, parts and assembly services. Features of Swing Arm Trailer Suspension Made of high strength materials, it is of strong bearing capacity, good wear resistanceAll Rights Reserved