Description： Colour: Blue Material: PVC Diameter: Approx.7cm Note: not as hard as stone. Apply in circular motions for a firm massage and to improve circulation. Stimulate muscle reflexes to ease tension and provide relaxation of the body. This spiky ball will be just right for massage, relaxation exercises, hand therapy and reflexology. Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Meanwhile, please be reminded that due to lighting effects, monitor’s brightness / contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item. Package including: 1pc x spiky ball