Description: 【Unique Design 】: Sit Up Tool features set up equipment and Boxing Ball together which can enhance stability during your workout. It firmly grips the floor. 【Stable Material】: Sit Up Boxing Reaction Ball is made of ABS PU Foam Stainless steel, suitable for beginners, and easy to train. 【Exercise Equipment】: Sit Up Bar makes sit ups easier, providing you with an efficient and effective abdominal workout. 【Reaction Target】: Abdominal Exercise Machine, an essential tool for boxing speed training, effectively enhances your reaction time and hand eye coordination. 【Training Equipment】: Our Boxing Reaction Ball with an innovative way is designed to boost your agility, concentration, and reflexes. Specification: Material: ABS PU Foam Stainless steel Size Chart: 28cmx57cm to 60cm/11.02inchx22.44inch to 23.62inch Chassis width: 15.5cm/6.10inch Foot guard width:28cm/11.02inch Ball: 20cmx20cm/7.87inchx7.87inch   Package Includes: 1 Sit Up Boxing Reaction Ball Note: Please allow slightly errors due to manual measurement.