Add some color to your workout with the j/fit Anti-Burst Exercise Ball. This anti-burst ball is made from a strong material that holds up to 2000 pounds and deflates slowly if punctured, minimizing the risk of injury. Use the ball to strengthen and tone your abs, back, or glutes in a whole new way thanks to the resistance from multiple directions. It's great for people of all ages and fitness levels. Pump and exercise guide are included. Choose from five different sizes: 18-inch (red), 22-inch (green), 26-inch (purple), 30-inch (jade), or 33-inch diameter (blue). About j/fit J/fit is committed to providing high-quality fitness equipment at reasonable prices. The selection has expanded from 10 products to over 300 in order to meet the needs of the marathoner, the beginner, and everyone in between. The fitness world is constantly changing, and j/fit aims to be on the forefront of the latest technology at each juncture.