Industrial rubber caster with steel core,roller bearing,fixed caster 1.size:3"-8" 2.material:rubber,steel 3. ... roller bearings Industrial rubber caster with steel core,roller bearing,fixed caster Item numberplate finishwheel diameter(mm)wheel width ... *06 »Color, size of diameter and Attachment can be customized«»Fixed,With or Without Brake. »Can have Screw,stem, plate,one bolt ...