High Quality: The portable sit-up bar is made of natural rubber, which is strong and durable. The handle of the portable sit-up bar has foam protection, wear-resistant, environmentally friendly, easy to hold, convenient and safe. 12.5 cm suction cup: Sit-up bar portable with thick silicone suction cup, the diameter of the suction cup is about 12.5cm, the strong suction cup can be firmly fixed on the ground. The portable sit-up bar is suitable for smooth surfaces such as tiles and marble floors, etc. Flexible and adjustable: The portable sit-up bar has a spring buckle and the height of the seated machine can be adjusted to 4 levels. The height can be adjusted according to your different needs according to your height. Easy to carry: The portable sit-up bars are small, light and do not take up too much space, which is very convenient for us to carry them. The portable sit-up bar is the perfect choice for abdominal training. Multiple functional uses: the portable sit-up bar can be used for sit-ups, flat rack, push-ups , abdominal exercises and other fitness exercises.