... and Color stability 2.Various of materials,such as NBR,EPDM,NR,SBR etc 3.Factor direct sales. Specifications1) Made of ... high quality food grade silicone material, other rubber material also available, such as NR, NBR, CR, EPDM etc. 2)Color and shape ... will be avaliableCertificationISO9001-2008,SGS,FDA,ROHSApplicable material: SIR, NBR, CR, NR, SBR, EPDM, FKM, IIR, BR etc..Packing Spec.Standard ...