Kingtom is a leading China Rubber Sealing Rings for Automotive Connectors manufacturer, supplier and exporter. Rubber Sealing Ring For Car is an important part of the wiring harness; its quality is directly related to the function of the wiring harness. I have encountered problems when directly using it on the wiring harness connector; the former sees surface holes or more, and the direct cause is material cutting corners or mishandling the rubber during the vulcanization process.