The CARBONI Shaft from BULLS are made of Carbon which makes them super strong and very light. The Carboni shafts are available in 1 color black and in 3 sizes MEDIUM: Length 46.8mm, Weight 0.98 grams. IN BETWEEN: Length 42.4mm, Weight 0.88 grams. SHORT: Length 36.4mm, Weight 0.75 grams. You can easily replace shafts with every dart. They come in a variety of sizes to customize your dart in length and feel. Sizes: XX-Short / Micro, X-Short, Short, In Between, Medium & Long. In addition, they also consist of different materials: nylon, carbon, plastic, metal, etc. In short, you can adjust your dart to your own taste and feeling by using different types of shafts.