... flexibility,soft Designed for children,health,safe eco-friendly;MOQ:100pcs Nameeco-friendly rubber caps fro swimmingMaterial100% high siliconeSize18*19cm ... non-toxic, odorless, chemically stable, insoluble in any solvents and solutions, in addition to hydrofluoric acid (HF) and strong ... with their own characteristics, it is because silicone in the manufacturing process can be controlled by the ...