Item Type: Balance Disc Product Material: PVC Product Specification: Black, with 1pc syringe type inflator. Product Size: Approx. 34 x 34 x 5cm / 13.39 x 13.39 x 1.97in Product Application: Balance disc for massage. Package List 1 x Balance Disc 1 x Syringe Type Inflator 1Balance Training: While sitting in class or working at a desk, this balance disc can exercise your balance and overall coordination to improve core strength. 2The PVC Material: Made from premium PVC material, the dynadisc with 34cm diameter is non slip, which enables longer service life and more convenient using. 3Wide Application: Suits perfectly for various training, including but not limited to core strengthening, waist training, aerobic exercise and so on. 4Two Sided Design: The smoother side has round humps, while the coarse side has larger humps, making the balance cushion non slip and ideal for comfy massage. 5Premium Present: You can give this workout balance disc to your family and friends as an excellent present for Christmas, birthday, anniversary and more.