MARKWORT ARM STRONG PITCHING & THROWING TRAINER

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Patented rotating ball for realistic training, sports-specific motion, and superior comfort.
Safely trains proper muscles to give more power, velocity, and accuracy.
Quickly clips to a fence or anchor.
Three tubes: Orange (Light) Blue (Medium) and Black (Heavy). Seven resistance levels.
Attachments for indoor and outdoor use.
For players of all levels.