Features: Premium MaterialThe billiards training assistant is made of good resin material with unique impact resistance and wear resistance, which is very durable and can stay useful after a long time use. Master Various Lever Methods QuicklyIt is very easy for you to master the high, middle and low practice points and the trainer can master various lever methods quickly.The players tend to place bets and control the standard lines and dots of the ball. Fine Workmanship The billiards training assistant adopts fine workmanship, the billiard ball is calibrated and polished during practice. Suitable for US pool eight ball. Product Specificationsitem type: billiards training assistant;material: resin ;color: as pictures shown;suitable: english snooker, small american ball;quantity: 1 pcs;weight: approx. 170g ;diameter: approx. 57.2mm/2.3in. Advantage The Pool Cue Ball is lightweight and small size, easy to carry, convenient to use. Package Includes: 1x Training Billiard Cue Ball Specifications: Material: Plastic Weight: 170g Diameter: 57.2mm/2.3inch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.