The 5 Pack Nylon The Original Shaft + Ring from BULLS are black colored shafts consisting of nylon and are packed in an advantage package of 15 pieces = 5x3 pieces. The Nylon The Original Shafts + Ring are available in 4 sizes MEDIUM: Length 48mm, Weight 1.28 grams. IN BETWEEN: Length 39mm, Weight 1.12 grams. SHORT: Length 33mm, Weight 1.02 grams. X-SHORT: Length 28mm, Weight 0.79 grams. You can easily replace shafts with any dart. They are available in different 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 through different types of shafts.