material Nerf Ultra darts: Fly up to 120 feet with Nerf Ultra darts, the farthest flying Nerf darts ever 20 Nerf Ultra darts: Contains 20 ground-breaking Nerf Ultra darts with innovative flight tip and Aerofin technology Nerf Ultra darts compatibility: Exclusively compatible with Nerf Ultra blasters. Keep backup darts handy! Product dimensions: Measures 4.4 x 15.2 x 17.5 cm (length x width x height) Nerf Ultra foam: Features lightweight Nerf Ultra foam for superior performance