1. Premium Material: This mini billiard ball set is made of eco friendly polyester resin material, resistant to impact and scratches, not easy to break, and reliable quality.2. Exquisite Workmanship: This mini pool table balls are professionally manufactured with perfect roundness and balance to ensure a excellent smoothness.3. Ergonomic Design: The mini pool balls have optimal color saturation and gloss to prevent eye fatigue. When the cue ball hits the other billiard ball, it's glossy without shaking and the sound is just right.4. Lightweight and Portable: These pool cue training balls are light in weight and compact in size, making them easy to carry and store, and easy to use.5. Prevents Off Tracking: With perfect roundness and consistent weight, these billiard balls give you more predictable control of rolling to prevent off tracking. Perfect for game rooms, bars, athleisure games and recreational sports.