PRODUCT DESCRIPTION We take the success of our tennis players seriously by constructing our GAMMA tennis ballhoppers for professionals and beginners alike. Our durable GAMMA Tennis Ballhopper BallTube with a strap is designed to last for the long haul and is perfect for indoor and outdoor use. It is designed to pick up and hold 18 tennis balls. Instead of chasing every ball that goes out of bounds, get tennis balls with speed and ease with our Tennis Ballhopper BallTube. In 1971, Dr. Harry Ferrari, a nuclear engineer and avid tennis player, created the GAMMA irradiation process for developing strong tennis strings. Forty years later, the GAMMA gut string and other GAMMA technologies are the results of our process of creating racquets, balls, stringing equipment, and other sports and outdoors recreational gear that holds up to the spirit of competitive players everywhere. GAMMA understands that athletes have a lifelong need to grow, perform, and strive for excellence, which is why we will never stop innovating. From the balls to the racquet strings and paddle grips, we know game-changing racquet accessories and pickleball accessories are the ideal way we can support your play, and we are ready to help. MANUFACTURER CONTACT INFORMATION phone: (800) 333-0337 email: sales@gammasports.com website: https://www.gammasports.com/