Golf swing training ball with intelligent inflatable to assist corrective training. Features: The design and structure are scientific and reasonable, easy to carry and easy to use. The size of the inflatable ball can be adjusted by itself, and the length of the neck rope can be adjusted, making it suitable for golfers of different heights. This inflatable smart ball attaches to an adjustable cord to suit anyone's needs. It is one of the best training aids on the market right now and can be used under the arms or inflated between the forearms. The smart ball will help you understand how your arms and body work during an effective golf swing. Now take control of your swing so you have effortless power instead of feeble power. Use this golf smart inflatable ball trainer to correctly master your swing posture, fix and strengthen your arm distance muscle memory. Specifications: Material: PVC Diameter: Approx. 15 cm/5.91 inches Color: Black Product Weight: Approx. 40 g Derivative Series: Golf Training Aid Type: Swing Trainer Packing List: 1 * Golf Swing Trainer Ball (Black) 1 * Inflator. We are an international seller and will ship your order from abroad, please allow at least 14 working days for shipment due to continued global shipping delays.