Product Size: handle length 11cm, wheel diameter 14cmColor: blue, greenMaterial: plastic, steel pipePackage content: 1*Abdominal wheel 1.NEW ERGONOMIC DESIGN with triple castors: smoother and more stable. The 3 wheels and the wider roller spacing ensure even weight distribution and better stability. This keeps the abdominal roller easily in balance. The 3 wheel construction also withstands fast movements with high pressure. Then the ergonomic anti-slip handles protect your joints and your back. The sturdy, non-slip handles are also easy to wipe clean after training. 2.MORE EFFECTIVE 5 in 1 ABTRAINER: The abdominal trainer is not only suitable for your abdominal training, but also for strengthening these muscles: back, shoulders, chest and arms. Thanks to the three-wheel design, the rotation of the rollers takes place smoothly on every floor. The extra-measured triple-wheel spacing gives you an ideal balance, so you can concentrate on the goal - top abdominal muscles. 3.Comfortable knee mat included: The enclosed foam knee protection mat protects your joints and can protect the knees from slipping and injuries during training. It can also be used as a seat mat. 4.: The well thought-out design and the use of high-quality materials make the a real quality product. Thanks to its simple and efficient use, the abdominal muscle trainer is suitable for both beginners and advanced users. The stability is guaranteed by the reinforced stainless steel central axis instead of a conventional plastic core. 5.NON-SLIP & EASY INSTALLATION: Easy 2-minute installation without screws. Reduced to the essentials, the product is light in weight and can therefore be transported flexibly. Ideal for every floor covering thanks to the good material: no slipping possible.