1.Dia.:50mm 2.Load capacity:35kg 3.Nylon,different fittings available, 4.Good quality 1.Product specifications:1. ... capacity: 35KG per caster 2.Wheel diameter:50mm3.Caster material: Nylon,pressed steel,zinc plated4.Chrome, zinc or nickel plating available ... such as swivel, fixed ,double brake plate 6.Plastic or nylon is ravailable 7.Applications: industrial ,supermarket, display racks, general usage ...