Sonwyoung 2 Pcs Training Ball with Pump 9 Inch Pilates Baseball Softball Batting Trainer Improve Arm Action Hitting & Pitching Efficiency Ball for Baseball(Purple)

["Training Equipment: you will receive 2 purple baseball balls, 1 pump, 2 inflatable straws and 2 stoppers; This set is an ideal equipment for practicing pitching and helping you correct your pitching posture","Increase Arm Core Strength: simply place the baseball batting trainer between your arm and shoulder during training and maintain contact with the training ball when pitching and catching; They can reduce arm discomfort and improve body rotation and movement efficiency","Material and Convenient Size: this yoga ball is made from PVC, making them soft, strong, elastic, lightweight, and easy to carry; With a size of approximately 9 inches in diameter, they can withstand powerful hits, and improve your batting and pitching focus and accuracy","Easy to Inflate and Time Saving: inflate easily through the accompanying tube or use the provided air pump; It's quick, convenient, and saves time; Truly a fitness ball that values your time and brings smoothness to your workout regimen","Multipurpose and User Friendly Fitness Ball: this multipurpose and user friendly therapy ball not only works as a ball for batting and pitching, it's also suitable for yoga, Pilates, shaping exercises, and fitness workouts; It helps people improve stability and coordination"]