Axle Hub Dust Cap made of carbon steel, zinc-plated makes it strong and , anti- and anti-rust Dimension: OD: 2.72 inch/ 69.1 mm; Please check the size information and compatibility carefully before placing an order Fitment: Fit most standard 7000 - 8000 lb trailer wheel hub for both types of axles for EZ Lube and standard; wide compatibility with 8 on 6.5inch trailer axles Package Include: 4pcs 2.72 inches trailer axle covers with 4pcs extra rubber plug; The extra 4 rubber plugs can be used as spare parts in case of emergency The trailer axle cap is designed to avoid the trailer axle from dust, preserve the grease, prevent axle and as decoration. Hub grease caps are designed with removable rubber plugs, easy to install and maintain Colour:Black & Silver Material:Carbon Steel Package Contents: 4pcs x 2.72inch Trailer Axle and Bearing Dust Cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.