Nerf Ultra. Pack of 20 darts (refill compatible only with Nerf Ultra blasters). Get your fill of darts with this 20-pack of refills for Nerf Ultra blasters! Nerf Ultra darts are the Nerf darts that fly further than ever, they can reach up to 36 meters away! These revolutionary darts feature an innovative aerodynamic tip, Aerofin technology and Nerf Ultra foam. Nerf Ultra darts only work with Nerf Ultra blasters. Live an unparalleled experience with Nerf Ultra blasters and darts: the advanced design and performance allow you to reach extreme distances, precision and speed. Take it to the next level with Nerf Ultra blasters and darts! (Each blaster is sold individually.)