Feature●National Moms Volleyball Federation Official Game Ball and Certified Ball●No. 4 (for middle school students and mothers)●Diameter: Approx. 7.9 inches (20 cm); Weight: Approx. 8.8 oz (25●Recommended internal pressure: 0.300 kgf/sq cm●Material: Natural leather●Note: Please be careful not to inflate too much. For best pressure, please refer to the pressure indication located on the inflator of the ball●Department Name: Unisex AdultDescription This is also said to be the origin of Mikasa, the official Mama-san volleyball game ball and certification ball.
Due to the use of natural leather, there may be slight individual differences in the appearance and texture of the leather.
Please be careful not to inflate too much. For optimal pressure, please refer to the pressure display located on the inflation port of the ball itself.
From the Manufacturer