【 Rival Ball Refill】: The Diameter of the Rival Ball is 2.3CM and has been tested extensively and proven to perform just as well as the name brand. 【Package Included】: The Package will have 150PCS Ball Refill for Nerf Rival. 【 Compatibility】: Works with Nerf Rival blasters, such as Kronos XVIII-500, Helios XVIII-700, Apollo XV-700,Khaos MXVI- 4000,Atlas XVI-1200, Artemis XVII-3000, Nemesis MXVII-10K and Zeus MXV-1200 blasters 【Warm Tips】: For safety, please don’t aim at other’s eyes. Wear eye protection when using Mega Dart. Not suitable for children under 6 years, if need, please under adult supervision.