Features: 1. Made of natural rubber for consistent feel and reduced shock. 2. The bounce height is about 130cm / 4.3 ft, these balls will have the same consistent bounce for the life of the ball. 3. Totally blank for autographing or display. The diameter is about 63 mm / 2.4 in. 4. Ideal for tennis ball matching and tennis practice. Specifications: Color: Yellow / Black / Blue / Red / Pink / Green (optional) Material: Rubber Item diameter: 63mm / 2.4 in Weight: 58g / 2 oz (single one) 696g / 1.5 lbs (12 packs) Package size: 21 * 14 * 14 cm / 8.3 * 5.5 * 5.5 in Package weight: 750g / 1.7 lbs Packing List: 12 * Tennis ball 1 * Storage bag Notes: 1. Due to manual measurement, there is a 1-2mm error in the product size. Please refer to the actual product. 2. The balls from the factory are packed tightly, so there may be an odor after opening the package. After airing out, the odor will gradually disappear.