Features: Adopting a unique threading tube traction sleeve structure to simplify the internal wiring process of the bicycles frame. Without the need for complex tools, cable installation can be quickly completed, suitable for bicycles repair enthusiasts and professional technicians. It is make of plastic, with good wear resistance and enduring performances. Suitable for various models of bike frames. Resolve wiring challenges for different vehicle models. By optimizing the cable layout, the risk of cable wear is effectively reduced, ensuring the smooth operate of the braking and transmission systems. Specifications: Component: Plastic Length: about 15.2cm/5.98inch Package Includes: 2Pcs Bicycles Internal Cable Routing Tool note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.