... Rubber ball with metal bone 1.Certificate: ISO9001:2008 2.Material: NBR, NR, EPDM, metal, etc 3.Different sizes Product NameRubber ball with metal boneCertificateISO9001: ... aromatic hydrocarbons and animal and vegetable oilSizeWe can provide you with many different sizes of rubber ball, according to your ... quality control etc. Please don't hesitate to contact with us for more information. Thank you .