Package includes: 1 x abdominal excercise roller Product feature: Automatic rebound, effective exercise, portable, durable The Ab roller features two wheels for enhanced stability and stabilizing brakes to protect you from injury. Its built-in high-elasticity silent spring allows you to push it forward to a tight position and automatically rebounds to safeguard muscles and prevent sports injuries. This quiet ab roller is a perfect fitness accessory that won't disturb your family. Note: There might be an error of 1-3 cm due to manual measurement, and slight color differences may occur as a result of varying lighting and monitor effects.