Nerf Whistler Darts - Refill and Reload 20 value pack Refill value pack includes 20 Whistler Darts that whistle through the air as they fly When shot from NITE FINDER EX-3, N-STRIKE MAVERICK and N-STRIKE VULCAN EBF-25 blasters (each sold separately) These foam darts are specially designed for high-flying, high-performance blasting And even whistle through the air as they fly With this 20 value pack of Whistle Darts and keep the game going even longer