Description: Multi Functional: Versatile ab training equipment can tone all areas including back, shoulders, arms, chest, triceps and stomach, including obliques and hip flexors. Good Material: This abdominal wheel is made of durable ABS PVC material, which is quiet, non slip, strong and wear resistant, and does not hurt the floor. Size 39cmx44cmx25cm/15.35inchx17.32inchx9.84inch. Stable and Smooth: The abdominal training roller is super stable and easy to control, two wheel ab roller well balanced, works for both men and women. Automatic Return: Ab training roller wheel has an automatic return function, which can be intelligently braked to help reset easily, making training easier. Application: Our Ab Roller is perfect for a home gym, can do plank support, and convenient enough to travel with. It is like having access to professional quality equipment anywhere and anytime, even in the office. Specification: Material: ABS PVC Size Chart: 39cmx44cmx25cm/15.35inchx17.32inchx9.84inch Package Includes: 1Ab Roller Wheel Note: Please allow slightly errors due to manual measurement and different monitors.