Heavy-duty Nylon swivel caster with side brake color:white loading capacity: 200kg to 500kg diameter:4"x2",5"x2",6"x2",8"x2" Heavy-duty Nylon swivel caster with side brake1.color: white2.loading capacity: 200kg to 500kg3.diameter:4"x2",5"x2",6"x2",8"x2"4.Fitting match: swivel, swivel with side brake, fixed5.material of wheel: PU on iron Heavy-duty Nylon swivel caster with side brake