NIUNIU Anti-Friction Shifter and Bottom Bracket Cable Guide for Road Bikes. Material: Made of high-quality, durable plastic, resistant to high temperatures and ensuring a long lifespan. Advantages: Its high-quality design provides smooth sliding and low friction, adapting to your cycling needs. Features: This guide is essential for routing brake and shifter cables between the front and rear shifting/braking systems on bottom-pull derailleurs. Use: Allows for routing shifter cables under the bicycle frame. A worn guide can negatively affect performance and is very easy to replace. Color: Black. Dimensions: 40mm long, 30mm wide, 7mm thick. Screws: M5 x 8mm. Quantity: 5 pieces (screws included). Note: Due to different measurement methods, there may be a 1-3cm deviation in measurements. Please ensure this is not a problem for you before ordering. 2. Due to differences in monitors and lighting, the item's color may vary slightly from the image. Thank you for your understanding. 3. The package includes only the contents listed above; other products are not included.