Features: Make from PU foam, this golf training ball ensures durability for extended practice without wear or tear. Light weight construction of this golf connecting ball allows for easy transportation to the driving range or home. The double arm fixing sleeve ensures a perfectly fit, helping you practice stable swaying. The two color design providing visual feedback and alignment assistance, promoting a strong hit by maintaining the correct wrist position. Suitable for most skill levels, this tool is perfectly for both newbies and experienced player looking to enhances their swing techniques. Specifications: Component: PU foam Size:: Small/M/L S Size: about 14.8x12.5 cm/5.83x4.92inch M Size: about 17x14 cm/6.69x5.51inch L Size: about 18.5x16 cm/7.28x6.3inch Package Includes: 1pc Golf Swing Trainer note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.