1. Four adjustable height modes-sit-ups on the floor bar, there are four height modes of 7.3-8.3 inches for you to choose according to the actual situation, just adjust the position of the gear. 2. Self-priming-Sit-up fitness bar, bottom 4.7 inch large suction cup, lightly press, the suction is stable and does not shake. 3. Rugged and durable-The high-density thick steel spring does not warp, is sturdy and stable, and the portable self-priming abs rod is designed for extreme durability. 4. Protect the instep from pain-high elastic wear-resistant foam will not hurt the feet, soft and comfortable, and protect the instep from pain. 5 Shape your perfect body-the abdominal muscle assist device helps you lose fat around your legs, waist, arms and buttocks, shape your body, and easily complete various movements. Product Notes: 1. Before use, wipe the floor with a damp cloth to further increase the suction power. 2. This suction cup is suitable for cleaning smooth floors, not for floors with uneven texture or cracks on the surface. 3. When using, the suction cup should avoid the tile joints. 4. Manual measurement, the size may have a slight error, please understand. 5. Due to different monitors, there may be slight color difference. Specification: Material: steel pipe + foam + rubber Color: (as shown in the picture) Size: 26*12*16cm/10.2*4.7*6.3in Weight: 1.76 pounds Applicable occasions: homes, schools, offices, gymnasiums, outdoor flat places. Package includes: 1 x self-priming lifting rod 1. This suction cup is suitable for cleaning smooth floors, not for floors with uneven texture or cracks on the surface. 2. When the suction cup is not sticky, clean the suction cup and the floor or add water to increase the strength. 3. Not suitable for uneven terrain such as carpets and asphalt roads