Official Size & Weight: A diameter of 74mm and weight of 26 grams, with 40 precisely machine drilled holes, conform to official USA Pickleball standards .Rotation molded one-piece construction ensures a stronger, longer-lasting ball that resists dents and cracking. Consistent Bounce & Fly True: Specifically designed and optimized for pickleball, The V-40 ball features 40 strategically aligned, precision-drilled holes, allows for airflow and precise placement, resists wind interference.providing the truest flight and most authentic bounce available. Material: PE Package included: 6pcs/set Pickleballs Note: Besides different computers display colours differently, the colour of the actual item may vary slightly from the below images, thanks for your understanding. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm)