Specifications: Material: PVC Optional Color: Purple, Blue, Pink Item Diameter‎: 9 Inches Package Weight‎: 0.52 Kilograms Package Includes: 3 x Mini Yoga Ball 3 x Inflatable Tool WHY USE PILATES BALLS? Long term use can effectively correct your posture and perfect your curve. It is suitable for girls who have too much belly, too thick hands and legs Enhance blood circulation and cardiopulmonary function. Inflation Step: Pull the valve plug out of the sphere and prepare the inflatable tube. Insert part of the inflatable tube into the hole and inflate it with mouth/inflatable pump. When filled with gas, quickly plug the hole with the valve plug. Inflatable completion,enjoy the yoga. Each product will be equipped with an inflatable tube, you can apply it to easily fill the yoga ball with air. Durable PVC material, strong tear-resistance for easily customizing the intensity of your workout. Exceptional versatility and durability, good for training muscles in back, belly, gluteus and legs. Perfect for fitness, body shaping, weight loss, resistance training, strength training, postpartum recovery, injury rehabilitation and more. Perfect for stretching to increase your mobility and flexibility, toning and strengthening your muscles.