Heavy-duty cast iron fixed caster with brake cast iron wheel loading capacity: 200kg to 500kg diameter:4"x2",5"x2",6"x2",8"x2 Heavy-duty cast iron fixed caster with brake1.color:black2.loading capacity: 200kg to 500kg3.diameter:4"x2",5"x2",6"x2",8"x2"4.material of wheel: cast iron Heavy-duty cast iron fixed caster with brake