Jack Pyke Slingshot Ammo is 9mm steel balls in a metal screw-lid tin. Approximately 100 balls per tin. For use with the Jack Pyke range of slingshots. *Knives, Slingshots, Slingshot Ammunition and Multi-Tools containing knives will only be sold to customers 18 and over and need to be delivered to a business address. Proof of age will be asked for before we will despatch your order. 9mm steel balls 100 balls per tin Size: One Size