Reduction bush for tractor lower arms The reduction bush for lower arms is a steel cylinder used to reduce the diameter of the coupling holes of the tractor's lower lifting arms. By using the 98178 reduction bush you can attach a greater number of equipment to your tractor, specifically it allows you to bring a category 2 joint to a category 1 one. The reduction bushes we offer are produced in Italy with high resistance steel. Technical characteristics of the reduction bush: Length: 44mm Inner diameter: 22.1mm (Cat. 1) External diameter: 28.4 mm (Cat. 2) Material: Steel Weight: 0.08 kg_x000D_Material Steel Diameter 28.4mm Production Made in Italy Weight 0.08 kg Length 44 mm Class 1/2 Hole diameter () 22.1mm