The Stemco 6-Bolt Integrated Sentinel Oil Hub Cap is designed to provide superior protection for your wheel end components. This hub cap is made from a strong aluminum casting and features an advanced window material that is designed to withstand higher heat temperatures before discoloring or deforming. The distinct red rubber plug makes it easy to differentiate from lower quality competitors. This hub cap is designed to provide superior protection for your wheel end components and is equipped with a 6-Bolt design for easy installation. FleetPride is your First Click in Heavy Duty®.