Powder coat paint with E-coating anti-corrosion treatment for superior finish. Hubs are forged steel, black paint finish, fitted with 4x12mm wheel bolts. Bearing is sealed for life automotive bearing, 30mm Internal, 60mm external, 37mm long. The shaft is 40x40mm x 125mm long, solid steel. Manufactured by SPP (Steelpress, Poland).
Weight capacity is 900kg per pair. (750kgs is road legal maximum for trailer without brakes).