Size: 14.51827cm Color: black and white, all black, maca gray Material: natural rubber + iron parts + foam Package content: 1* crunches and prone machine 1.Train anywhere. The basis of the sit-up training device is a suction cup that is very easy to attach and carry. Whether in the living room or in the bedroom or even in the office, you can work out because besides the suction cup design, it is also small in size, without a doubt a portable sit up exercise machine. 2.3-step adjustable height. We have developed 3 adjustable heights for users of different heights and body types. You can adjust the height of the sit-up exercise machine at any time to find the most suitable height. 3.Safe training. The bar is wrapped in foam that can cushion your stress during exercise. In addition, we have developed double bars as an upgrade version, which not only ensure that your training is safer, but also offer you a particularly comfortable workout. 4.Easy to installThe suction cup can be attached with a push of a button. N The suction cup is easy to attach first wipe the dust on the floor and the suction cup with a clean damp cloth, then place the suction cup on the floor and press until the two are dry On the suction cup to force the air out of the suction cup. Finally, press the buckle to secure the device. But please note that the suction cup cannot be placed on the floor gap. 5.The maximum load is 90 KG. The maximum weight is about 90 KG, which is suitable for almost all users. When you're ready to work out, just take out your sit-up exercise machine to start your workout at home and stay healthy.