Heavy-duty Nylon swivel caster 1.color: white 2.loading capacity: 200kg to 500kg 3.diameter:4"x2",5"x2",6"x2",8"x2" Heavy-duty Nylon swivel caster1.color: white2.loading capacity: 200kg to 500kg3.diameter:4"x2",5"x2",6"x2",8"x2"4.Fitting match: swivel, swivel with side brake, fixed Heavy-duty Nylon swivel caster