Specifications: Item Type: Pull Up Training Ball Material: PU + 304 Stainless Steel + Plastic Color: Yellow Bearing: 200KG Package List: 1 * Pair of Ball 1 * Pair of Hanging Hook 1 * Pair of Belt Notes: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Premium Material: The pull up ball is made of high quality materials, it is sturdy, durable for long time use. The device brings more fun to your exercise and improve your exercise performance. Good Bearing: The training ball adopts 304 stainless steel accessory, it is a good bearing and do not easy to fracture. It is perfectl not only for normal fitness, but also for extreme sports such as rock climbing enthusiasts, wrestling, ninja warriors, gymnastics, and parkour. Convenient to Use: Lightweight and small size about ball, it is easy to carry when you go out for training, convenient to use.It can meet your need and bring a better experience about training. Anti slip Design: With elastic plastic ball, good grip feeling and even distribution of concave points on the surface, not easy to slide. Ideal Accessory: The arm training ball is an ideal accessory for you to do pull up and train arm strength. Muscles tendons lay ergonomically and train efficiently. Excellent to add into your workout routine.