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 ... , injection, transfer, inserting molding, extrusion and blowing We are make silicone rubber a manufacturer ,Pictures for your reference----------------silicone o-ring seal