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