Thank you. This is a popular set item recently. It's about 800 yen cheaper than buying tennis balls separately, saving on shipping costs. ◆ Used soft baseball balls from a batting center, 30 balls, all washed (M-ball size equivalent, the balls in photos 3, 4, and 5 are the subject of this product) ◆ Used hard tennis balls, 15 balls (I don't know the manufacturer, etc. There is some fine thread and debris attached.) It seems that tennis balls are used for fielding practice and free batting in a small space. How about adding them to your self-training menu? ※For reference [Hard Tennis Ball Standards - From Wikipedia] Diameter (mm) 65.4～68.6 Weight (g) 56.0～59.4 [Junior J Ball Standards - From All Japan Soft Baseball Federation HP] Diameter (mm) 68.5～69.5 Weight (g) 127.2～130.8 We basically use recycled materials for packaging for the sake of the environment. We will set a plastic bag inside the cardboard box. First, put the soft baseball balls in, and then put the hard tennis balls on top. Please refrain from purchasing if you are overly concerned about details. Please enlarge the photos, etc., and purchase if you understand. #baseball #softball #softbaseball #practice #used #selftraining #Mball #mball #softball #softbaseballball #softball #youthbaseball