[Comprehensive Golf Training Package]Our package comes with 2 uninflated golf training balls and 2 adjustable ropes,1 inflatable cylinder .Customize the size of inflatable balls to meet your unique needs and height, making it the perfect training aid suitable for both beginners and professional golf enthusiasts. [Premium and Environmentally Friendly Material]Our Golf Swing Trainer Ball is crafted from flocking PVC that is eco-friendly. With just enough air for cushioning between the arms, this trainer makes for an impressive tool for both beginner and professional golf coaches. [Highly Effective Training Aid]By hanging the golf smart ball on your neck, you can use it for five swings, then use without. This method assists in using your hands more effectively during the last 1/3rd of the downswing, dramatically improving your swing skills. [Visible Results after Few Practices]Use the Golf Swing Trainer for only a few practices to strengthen the arm muscle memory and you'll start to notice remarkable improvement on the golf course as your body automatically adjusts to the correct swing positions. [Multi-functional Golf Assistant]Our golf intelligent inflatable SwingTrainer ensures that you can correctly grasp the swing posture, fix and strengthen the arm distance muscle memory, and avoid arm bending. By synchronizing your body and arm, you can effectively improve the swing skills, master the correct swing posture, and find the right hitting point. Colour:Black Material:PVC Package Contents: 2 x balls 1 x pump (the color of the pump is random, don't accept the specified) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.