Product description Size: 55cm Color: pink, black, blue Material: PVC Package content: 1 Yoga ball 1Pump 1Pneumatic pull 2Air lock 1.Explosion-proof system: The high-quality PVC material and innovative explosion-proof system make the training ball wear-resistant and should be prevented from bursting. Please note: Explosion-proof systems have functional limitations. Before and when using the ball, always make sure that the ball is not damaged. There must be no sharp objects on or near the floor to avoid damage to the material. 2. Multi-function: The fitness ball is the perfect complement to your home gym. Whether it's Pilates, yoga, exercise to find or abdominal training. It is also very suitable as a sitting ball in the office or at home. 3. Slip-resistant surface: Because the surface of the sports ball is slightly rough, it is particularly non-slip and wear-resistant. In addition, only non-polluting and therefore skin-friendly materials are used in production. 4. Easy to inflate: Use the quick inflating foot pump in the easy-to-use box to save time and energy. It only takes a few minutes to inflate the stability ball. Equipped with 1 air pump, 1 air tube, 2 air plugs and 1 valve remover. 5.Variety of uses:Exercise balls are intended for core strength balance . Use our exercise balls for a wide array of active exercises such as yoga, pilates or cross fit to improve strength . Our exercise balls are also useful sitting at a desk, labor support during pregnancy and birthing.