The Stemco 6-Bolt Integrated Sentinel Oil Hub Cap is the perfect choice for your vehicle's oil hub. This hub cap is designed with a distinct red rubber plug, making it easy to differentiate from lower quality competitors. The hubcap is made from a strong aluminum casting with advanced window material for superior strength and durability. The flange inner diameter is 4-9/16" and the flange outer diameter is 6-3/16". This hub cap is designed to withstand higher heat temperatures before discoloring or deforming. FleetPride is your First Click in Heavy Duty®.