... ..Diameter1.0-50.8mmApplicationwidely applies in the ramming bearing,the valve,the seal,measuring appCertificationISOHardnessHRC20-60Place of OriginShandong, China (Mainland)Brand NameUMTModel ... General stainless steel widely applies in the ramming bearing,the valve,the seal,bicycle ,motorcycle,AISI 440CSize :1.0-50.8mmGrade:G16 ...