Material: Textile belt, rubber, steel pipe Colour: Black Size: 29cm Stretching: 36cm Function: Sit-ups, exercise the abdomen, no need to install, light and portable Design: Adjustable sizePackage List 1* Sit Up Traine Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size. 11. Multiple uses: 4 proven ways to use. Train anytime, anywhere, and don't let your environment limit your workouts Use for reverse crunches, leg raises, ab workouts, classic crunches, crunches, and more The hamstring curl machine is suitable for fitness enthusiasts of all ages. 22. Premium material: A really sturdy sit-up aid The center bar of the Hamstring Curl Band is made of steel for maximum stability and control. Thickened, curved, non-slip, cushioned high-density foam padding provides comfortable foot or ankle support. And high-grade nylon webbing. 33. Exercise equipment: The Hamstring Curl Band is the perfect waist and abs exercise equipment, allowing you to practice better crunches by placing your feet on the floor and maximizing activation of your core abdominal and hip flexors form. 44. Easy to set up: The sophisticated design makes the device easy for anyone to use. Do not use this device with glass doors 55. Portable: It's easy to put in a backpack or suitcase, and it's very convenient whether you are traveling, traveling, or going to the gym.