... Auto Rubbers Part Features,1) Available material : material for Silicone NBR,Fsil,VITON(FKM)&Dow elastomers,Neoprene,HNBR,Natural rubber,SBR,IR ... ,IIR(butyl rubber),ACM ect.NSF an KTW approved for material ... resistance, anti-ozone and aging, wearable,great flexibility etc. various rubber products