Suitable for stem and bowl set cover and mount to unlock riding angles Replace the bowl set cover and install it, which means the bowl set cover is no longer This is the bowl set cover. Install the screws and tighten them. Measurement: You can measure the outer diameter of the front fork or the inner diameter of the stem to confirm specifications. Most head tubes are 28.6mm, which is the so-called OD1 ordinary specification. Known: -Pattern, , , DET, Ruibao, FACTOR, etc. are all OD1 size Function 1: OD1 28.6mm stem headset cap Function 2: bike light/camera holder bracket Features: It's not only a headset cover, it's also your light holder, camera mount, give you a view of riding. Material: plastic colour: Black Package Contents: 1 x Bicycle Stem 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.