Cat® Seal Plugs are used to protect unused terminals of the electrical connector and provides a tight seal for wire entries on electrical connectors. They are designed using the right combination of material and shape to deliver the performance you expect for your application. Specialized design provides long, reliable seal life and provide additional protection in the most extreme environments. Silicone rubber pull plugs withstand high temperatures and harsh environments for long periods of time with ideal thermal stability and electrical insulation. Designed to meet or exceed the performance of industry standard parts and provide leak free performance. Quality you expect for your machine.Application:Cat® Seal Plugs are used for reliable electrical connections across the range of electrical applications seen on Cat® equipment. Consult your owner's manual or contact your local Cat® dealer for more information.