Features:1. Made of natural rubber for consistent feel and reduced shock.2. The bounce height is about 130cm or 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 or 2.4 in.4. Ideal for tennis ball matching and tennis practice.Specifications:Color: Yellow or Black or Blue or Red or Pink or Green (optional)Material: RubberItem diameter: 63mm or 2.4 inWeight: 58g or 2 oz (single one) 696g or 1.5 lbs (12 packs)Package size: 21 x14x14 cm or 8.3 x 5.5 x5.5 inPackage weight: 750g or 1.7 lbsPacking List:12 x Tennis ball1x Storage bagNotes:1.Due to manual measurement, there is a 1-2mm error in the product size. Please specific to the actual.2.The balls from the produced factory are packed tight, so there will be smell after opening the package. After ventilation time, the smell will gradually disappear.