This is the viper shaft from Winmau , nylon shaft and aluminum top were the flight connects to the shaft. This shaft is very popular because it incorporates the best of both worlds . The shaft does not need o-rings the nylon is very stable with any barrel on the market out there. The colors are black white and red. The shaft comes in med and short lengths . And is very light so the speed of the dart moves faster to the board. The width of the shaft is beefy but allows good air movement around barrel of the shaft. How would I rate the shaft 1-10 8 sizes 1-10 9 colors 1-10 7 it needs more colors out there . All and all this is a great dart shaft for anybody use.