... gum rubber balls 1.Material:nature(NR) 2.Good quality and best price/OEM 3.Certification:ISO9001:2000 nature(NR) rubber ... drawing or samplesMatetialNBR, NR, FPM ,EPDM ,SBR ,SR ,CR, HNBR, IIR, PTFE, Silicon,PU etc ... . Can choose on your requirement; Color Black, red, yellow, brown, white, green, violet ... drawing or samplesMatetialNBR, NR ,EPDM ,SBR ,SR ,CR ,IIR , Silicon, etc.PackingInner packing ...