Good performanceof silicone stopper: 1.Silicone stoppe is made of silicone,environmental-friendly ,safe ,durable, 2.Silicone stoppe has high/low temperature-resistant, wearing-resistant, high tensile strength, all availableThe molding silicone stoppe processes we use is Comprssion Molding: Taking a pr-measured amount of raw rubber material that is placed into a heated open lower mold cavity.This ...