Dart Refill for Nerf N-strike Elite Series Blaster,Pack of 100 Material: Sponge + Silica gel Mega darts fly 85 feet and scream as they fly When fired out,the bullet can make whistle sound,very interestingThe head of the bullet is with a hole Darts Size:9.5x2cm/3.74"*0.79" Note: The head of each bullet is soft and safebut still not aim at companion's face,to prevent eyes from injury;Due to the difference between different monitors,the picture may not reflect the actual color of the item. Thank you!