# Four-wall · Rule 2.2 Ball · A.

Only USHA official balls shall be used in all USHA events.

## Mentioned here

- [Ball](https://handball.theperfectship.com/ball.md)
- [USHA](https://handball.theperfectship.com/usha.md)

Source: USHA official rulebook, used with written permission — https://www.ushandball.org/