Cat® Dust Cap provide an environmentally sealed interface to prevent the intrusion of moisture, dirt and other contaminants into unmated plugs. Dust Cap used to protect internal components from external contaminants. Cat® Caps are held to the highest standards of quality and reliability. These caps are manufactured to exact tolerances. Quality you expect for your equipment. It is a RoHS compliant product. They are manufactured to precise specifications and are built for durability, reliability, productivity, strength and quality. Designed to work in unison with the rest of your Cat® components to ensure maximum potential of your equipment. Application:Consult your owner's manual or contact your local Cat® Dealer for more information.