【Durable Construction for Heavy Use】Made from glass-infused nylon with a reinforced spring system. This is 15x stronger and 5x heavier than standard tees, resisting tipping, cracking, and breaking for reliable ball delivery during intense practice sessions. 【Adjustable Height for All Skill Levels】Designed for youth, amateur, and advanced hitters. Adjusts up to 46 inches to practice different pitch zones, refine swing path, and repeat proper mechanics with every rep. Great for players, coaches, and parents. 【Solo Hitting Without a Pitcher】This batting trainer allows players to practice hitting on their own. The spring-loaded design pops the ball up repeatedly, making it ideal for individual drills, backyard training, or team warm-ups – no pitcher needed. 【Works with Popper Balls Only】Engineered specifically for use with Popper Balls. A real baseball may damage the ball holder and prevent proper pop-up function. One Popper Ball is included so you can start practicing right away. 【Compact & Portable for Easy Storage】Lightweight and easy to set up anywhere. Suitable for home batting cages, backyards, or travel. A practical training tool for solo practice, youth leagues, or high school teams.