Regulation Size Pool Table Balls Set American Style 16A 57.2mm Billiard Pool Balls for Replacement These billiard balls have perfect roundness and consistent weight. It's imperative for your hitting, so you able to control the roll more predictably for the run out. They are smooth no wobbles and sound just right when the cue ball hits another billiard ball. Features:  57.2mm regulation 16A pool ball set, includes 17 ball (extra 1 Cue ball) and 2 chalks. Each balls were calibrated and polished for perfectionism. Classic art number style, perfect for house and bar use. This pool balls billiard set has uniform density, easy to roll up and control. This pool balls billiard set is made of high-end resin for strike-resistance and better sturdiness. Specifications: Material: Resin Diameter: 57.2mm/ 2.3in Weight: 3.3kg/ 7.3lbs Package List: 17 * billiard balls  2 * chalks