1、Round Size: For 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. 2、Has been tested extensively and proven to perform well. 3、Includes 50pcs rounds foam balls, meet your multiple needs. 4、Non-toxic,to ensure the entertainment and security in the competition. 5、Foam ball, good elasticity, far range, high hit‑rate, light weight for game themed party. Diameter: 2.2cm (± 0.1cm) Quantity: 50PCS Material: EVA Manufacturer recommended age: 5 years old and above Applicable to model: [Round Size]: For 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