hospital furniture caster wheels,medical caster wheels Wheel Material:TPR,PA Size:3" x 32mm ; 4" x 32mm ; 5" x 32mm Loading Capacity:80kg-100kg Bearing Type:Single Ball Bearing Type Optional: Plate Swivel,Thread Swivel,Stem Swivel,Bolt Hole Widely used as hospital bed caster,Medical trolley caster,medical devices caster