transparent silicone hand grip ball wrist exercise relief pressure ball rehabilitation for finger exercise equipment Descriptions: 1. product name: egg-shaped transparent silicone grip ball hand training physical therapy injury rehabilitation finger booster 2. material: TPE 3. features: 1) made of durable and high elastic material, this egg-shaped ball is flexible for grip and suitable for all ages. 2) designed for primary strength and rehabilitation training, can exercise palm muscles and improve the flexibility of fingers. 4. size: about 5.84.4 cm/2.281.73 in 5. grip: (approx.) soft grip: 10kg

middle grip: 20 KG

hard grip: 40 KG