1、Ergonomics design---- Human fingers are different in length. This elliptical grip ball is meant to enable five fingers to be trained at the same time. 2、Fit with the hand palm---- Disperse the force bearing point of the palm, so it can be used for a long time without feeling tired. 3、Round finger hole---- Because stroke patients suffer from spasmodic stiffness in their fingers, without this design, the grip ball could fall from the hand, thus affecting the entire recovery process. 4、Innovative material---- Non-odorous molecular structure PU material, with the advantages of good elasticity, breathable and not easy to make the palm sweat, without deformation after long-term use. 5、Strong universality---- The greater the force, the greater the elasticity, suitable to use for training in the early, middle and later stages of recovery. Features: Ergonomics design---- Human fingers are different in length. This elliptical grip ball is meant to enable five fingers to be trained at the same time. Fit with the hand palm---- Disperse the force bearing point of the palm, so it can be used for a long time without feeling tired. Round finger hole---- Because stroke patients suffer from spasmodic stiffness in their fingers, without this design, the grip ball could fall from the hand, thus affecting the entire recovery process. Innovative material---- Non-odorous molecular structure PU material, with the advantages of good elasticity, breathable and not easy to make the palm sweat, without deformation after long-term use. Strong universality---- The greater the force, the greater the elasticity, suitable to use for training in the early, middle and later stages of recovery. Specification: Condition: Brand New Material: PU Color: Yellow Size: Approx. 10.5 * 9 * 5.6 cm / 4.1 * 3.5 * 2.2 in Weight: Approx. 38 g Package List: 1 * Grip Ball Note: * For different monitors, the color may vary slightly. Besides, please allow some errors of manual measurement, thank you for your understanding.