The white carbon black (main constituent is silicon dioxide) has five series: FHY-100, FHY-160,FHY-180 , FHY-180G, FHY-258 and etc. Widely applied in the white rubber product (for example, shoemaking, rubber tube adhesive tape, tire), the plastic, the agricultural chemicals, the paint, the feed additive, professions and so on. so many sellers on internet .we are compelled to give you better price .welcom to vist our company .after autoptical we must build good cooperate.if yu bnsy ,we can offer 500g sample for free ,pls feel free to contact us .thank you sir !