This is an air pump that can be used for Nakayoshi Color Balls and Puwa Balls. We're selling this because we discovered that this air pump can be used to inflate Puwa Balls while we were playing baseball with these balls! The air won't leak out immediately after inflation. The air will gradually leak out after a few days of use, but you can use it again by re-inflating it! *Due to the nature of the product, there may be some balls that don't inflate properly and leak air. Please understand. *The third photo shows the Puwa Ball and Nakayoshi Color Ball. *Balls are not included.