Features: Light weight, reusable and durable. High quality, CNC numerical control forming, finely crafted. Surface of anodized, colorful colors for you to choose from. Great internal thread, smooth adjustment. High elastic stainless spring is good for you. Suitable for mountain bike and road bike. Specification: Item color: black, red, titanium color (optional) Product material: aluminum alloy Suitable for 4mm outside diameter derailleur line & 5mm outside dimeter brake cable Use: mountain bike, small wheel bike, track bike, fixed gear, road bike etc. Dimension: approx. 3.5cm / 1.4in(long) Item weight: approx. 7g Package List: 1 pair * bicycle adjuster bolt (Bikes and other items in picture are not included the list.)