DescriptionThe hardness of these massage balls is divided into three types: soft, medium, and hard, and the appropriate hardness level can be selected according to the needs. They are very suitable for professional training to gradually increase the hardness. Small and design, recommended as daily gifts to your family and friends.Features-Color: Assorted Color. -Material: TPE. -Size: About 5.80X4.40X4.40cm/ 2.28X1.73X1.73in. - The 3 massage balls are made of durable materials and can be used for a long time. - The high-density massage balls can help you move the muscles and bones of your fingers and release pressure. - They relax the contracted muscles and stimulates the stretching reflex effect of the muscles. - Some necessary tools can be used in fitness or office. - Three strength designs, divided into soft, medium and high strength, you can choose.