... quantity. 2. Anti-toxic, high quality. 3. ROHS approved.. 4. Small quantity accepted. Details about product: 1. Materials: silicone rubber o-ring for ... resistant, aging resistant, weather resistant, good insulation property, anti-toxic, good air-permeable silicone rubber o-ring for toys, etc.4. Hardness: 20 ... paper packed outside, can be water proof.product pictures: Anti-toxic silicone rubber o-ring