NR rubber ball as your request Certificate:ISO9001;2008 Material:NR.NBR .EPDM .etc Size: ... different sizes Product NameNR rubber ball as your requestCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone and chemical resistanceb. High temperature ... with many different sizes of NR rubber ball as your request according to your drawing or samplesMatetialNBR, NR ,EPDM ,SBR ,SR , ...