1. Twin wheel caster 2. Swivel caster with central lock 3. Soft swivel castors, used to meal delivery carts on airplan Caster Parameter: Model numberP190 ... plating, machine assembling and capability tests for furniture caster, instrumental caster, industrial caster, heavy-duty industrial caster, medical casters.3) We have our own ... us know, we could make it customized for you. Twin Wheel Castor