... , 4.Good quality 1.Product specifications:1.Load capacity: 35~45kg per caster 2.Wheel diameter:50~60mm3.Caster material ... : Nylon,pressed steel,zinc plated4.Chrome, zinc or nickel plating available 5.Matches with different fittings such as swivel ... corrosion-resistance.Now it already has become a professional caster company which integrates design, manufacture, assemble, inspection and ...