6.The pressure inside the ball can significantly affect performance and may affect the life of the ball. To check the pressure of the ball, we recommend that you use a pressure gauge, which will help to set the pressure of the ball before use and that you get the most Best Colour:Black White Material:PU leather Size:Diameter: 21cm Package Contents: 2 * Football Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 2,Develop Motor Skills: Very suitable for playing with friends. Playing ball helps develop motor skills. 1,Size 5 PU Leather Football: Ordinary PU leather football. 3,Wide Application: perfect for going to the park, beach or Lido or having fun in the back garden. 5.To avoid damaging the football, you should be careful when inserting the inflation needle into the ball when using the pump, especially during the first inflation. We recommend that you lubricate the inflation needle with glycerin so that you can insert it smoothly and carefully. After insertion, inflate your ball to the required pressure; the recommended pressure is printed on the valve and should not exceed the maximum pressure. 4,Suitable for All Weather or Ground Types: High-quality footballs are suitable for all weather types and all surfaces, such as turf. The soft foam lining can the initial contact and cushion the impact, helping to develop athletic ability.