Here are the key features of the Billiard Ball No. 8 (57 mm):

1. Standard Size: Measures 57 mm in diameter, adhering to industry standards for cue sports.
2. Material: Constructed from durable materials to withstand frequent use and maintain its shape.
3. Smooth Surface: Provides consistent roll and playability on billiard tables.
4. Color: Typically solid black, distinguishing it from other numbered balls on the table.
5. Versatility: Suitable for various cue sports games, including eight-ball and straight pool.
6. Durability: Designed for long-term use without compromising performance.
7. Visibility: Clearly marked with the number 8 for easy identification during gameplay.
8. Compatibility: Compatible with standard cue sticks and billiard tables.

These features highlight the reliability, durability, and standard specifications that make the Billiard Ball No. 8 a fundamental component in cue sports, essential for both recreational play and competitive tournaments.