Steel wheel is described as follow: TO41S+ SUSPEND PULLEY HOLY MENTAL PRODUCTS YUYAO CO.,LTD STEELROLLER DIAAROLLERWIDTHHEIGHTBCENTERCSCREWDCENTERETHREADFTO41S-19Ø19mm1872.564.04030M 8TO41S-20Ø20mm1974.064.04030M 8TO41S-22Ø22mm1975.064.04030M 8TO41S-24Ø24mm2076.064.04030M 8TO41S-25Ø25mm2176.564.04030M 8TO41S-38Ø38mm30120.099.25548M12TO41S-45Ø45mm30123.599.25548M12TO41S-55Ø55mm33165.0140.09060M20TO41S-65Ø65mm33170.0140.09060M20