Min. Order: 1000 Pieces 1.Name:Seal ring 2.Size/Color:all kinds 3.Material:Silicone 4.Good ... airtightness,best price,s silicon rubber sealing ring Materials: different kinds of rubber & plastic, such as Silicon, NBR ... , gasket rubber, O-rings. 3) Processing methods: compression, injection, transfer, inserting molding, extrusionand blowing.4) All manufacturing processes confirm to the ...