Features: 1. Made of natural rubber for consistent feel and reduced shock. 2. The bounce height is about 130 cm / 4.3 ft; these balls maintain consistent bounce performance throughout their lifespan. 3. Smooth surface ideal for autographing or display. Diameter is approximately 63 mm / 2.4 in. 4. Suitable for tennis ball matching and tennis practice. Specifications: Color: Yellow, Black, Blue, Red, Pink, Green (optional) Material: Rubber Item diameter: 63 mm / 2.4 in Weight: 58 g / 2 oz (single ball); 696 g / 1.5 lbs (12-pack) Package dimensions: 21 x 14 x 14 cm / 8.3 x 5.5 x 5.5 in Package weight: 750 g / 1.7 lbs Packing List: 12 x Tennis balls 1 x Storage bag Notes: 1. Due to manual measurement, there may be a 1–2 mm variation in product size. Please refer to actual product. 2. Balls are tightly packed at the factory, which may result in an initial odor upon opening. The odor will dissipate after a period of ventilation.