Features: 1.Aluminum alloy material, hard and compressive 2.Sliding rod design, smoothly sliding left and right, convenient for cleaning the strip 3.It can transform into a chain oiler with the oiling sponge ring. 4.H-shaped chain groove structure to avoid chain skipping during shifting 5.Small size design, easy to carry when going out, magnetic storage design.    Notice: Please allow 1-3cm deviation due to manual measurement Actual color may be slightly different from the image due to different monitor and light effect Description: Material:Aluminum Alloy Size:as shown Package List: 1 set  x Dummy Hub