These darts work with any blaster and most original blasters (sold separately), so whatever your blaster of choice, ammo up with the Refill Pack! We made the darts with high quality materials to last long time and most efficient possible so they will go a little farther and more precisely. Our bullets form a tighter seal for high accuracy and velocity. New design for the darts head is especially designed for children, more soft and more safety than the old version. Dart’s head is made of TPR material. When it struck an object or a surface, with the crumple zones that help absorb impact energy in a collision. Safe and Reusable: Body (EVA Sponge), Head (TPR Material, Very Soft). Specifications: Length: 7.2cm Diameter: 1.2cm Material: TPR + Foams Package included: 100pcs x Blue Hollow Out Soft Darts Note: 1, The head of each bullet is made of soft plastic, so a little bit hard, please don’t shoot at people directly in short distance to prevent hurt, especially do not aim at the people’s face, to prevent injury to the eye. 2, Due to the difference between different monitors, the picture may not reflect the actual color of the item.