... bearing Load capacity :70kg,90kg,100kg Housing: Made of New PA injection Plated:Zinc/Chrome Function Wheel Material ... as medical casters ,medical trolley caster, medical facility castor, hospital bed caster, nursing cart caster ,shelving caster ... stretcher caster, healthcare bed casters, universal tables castor wheel, worktable castor,nylon yoke castor, plastic brake caster, plastic medical caster.