Features 1. Superior Quality: The handles are made of quality material, strong and durable. The wheels are made of high-density rubber material to ensure it withstands even the most intense workout sessions, which will not damage the floor. 2. Automatic Rebound: The built-in spring and greater resistance can prevent the wheel from slipping during smooth exercise.automatic rebound function can protect you from injury during exercise, especially suitable for beginner. 3. Lightweight and Portable: This premium core wheel helps build and tone your abs, arms and back. Perfect for home, the gym, or the office! You can work out any time and anywhere, make your fitness more efficient. 4. Comfortable Non-slips Handle: The handle is made of high-quality cotton absorbent, curved and thickened sponge, and the extended handle feels comfortable, anti-slips and anti-sweat and anti-wear. 5. Bearing: Improve the mechanical efficiency and reduce the friction resistance, the bearing roller is not only flexible but also more quiet. Specification Material: Rubber, Plastic, Steel Color: Blue, Pink Size: 37 x 25 x 15 cm Weight: 2000 g Package Include: 1 Abdominal Wheel (With Knee Pad Mat)