silicone seal for obturator: 1.silicone o-ring,silicone seals,rubber ring,o-ring 2.Different hardness 3.perfect sealabilit silicone o-ring1) Materials: silicone rubber2) Characteristics: high/low temperature-resistant, -40-+200 Degree, non toxic3) Specification:all size4) Standard and Nonstandard5) Different sizes and structure available6) Colors: different colors available7)methods: compression, ...