Build your core and develop your abs with the Duo Ab Wheel from Fitness-Mad. Providing greater stability with a two wheeled design and the ability to workout on any smooth floor. Lightweight and portable - the perfect size to fit into your gym bag. Product details: Dimensions: 40cm (W) Material: Metal bar inside PP handles with TPE rubber grips. EVA tire & PVC end caps. Caution: This product should not be used by those with shoulder, neck, back or abdominal conditions or when pregnant. Keep device away from children. Always check with your Doctor before starting a new exercise regime.