Thank you. This is a popular set item recently. It's been purchased by people whose children have just started playing baseball. Since it's a set purchase, shipping costs are reduced. ◆ 20 used soft baseballs from a batting center (M-ball size equivalent) ◆ 15 used hard tennis balls (details such as the manufacturer are unknown) A recent buyer said they wanted to practice fly balls with their child using a knock. It seems that improving fielding skills is essential for their child to become a regular player. However, the father has no baseball experience and his knocking accuracy is poor, so he thought that practicing with tennis balls and a racket would allow him to hit relatively stable fly balls, thereby improving practice efficiency. (A touching story) Others use tennis balls for fielding practice and free batting in small spaces. How about adding them to your self-training menu? ※For reference [Hard Tennis Ball Specifications - From Wikipedia] Diameter (mm) 65.4～68.6 Weight (g) 56.0～59.4 [Junior J Ball Specifications - From All Japan Soft Baseball Federation HP] Diameter (mm) 68.5～69.5 Weight (g) 127.2～130.8 Packing materials are basically recycled for the sake of the environment. A plastic bag is set inside the cardboard box. First, the soft baseballs are placed at the bottom, and then the hard tennis balls are placed on top. Please refrain from purchasing if you are overly concerned about details. Please enlarge the photos, etc., and purchase only if you understand. #baseball #softball #softbaseball #practice #used #selftraining #Mball #mball #softballs #softbaseballballs #softball #youthbaseball