●Specifications: Diameter: Approx. 2.9 inches (7.4 cm); Weight: Approx. 1.1 lbs (0.425 kg) ●Material: PVC, Sand ●Contents/Accessories: 6 x balls ●Country of Origin: China ●Please be sure to use this product under the supervision of a guide. Especially when you practice hitting, be sure to have no people around or in the direction of the ball flying and limit the number of hitting to avoid wrist injury