3 LEVEL RESISTANCES There are 3 hand grip rings (20LB, 30LB, 40LB) In this hand grip strengthener set . Allowing you to gradually increase the difficulty of your training as your strength improves. Suitable for the people from beginner to professional,relaxation or athletics. Also suitable for elderly and people with arthritis. Portable and light weight, bring them anywhere COMFORTABLE SILICONE MATERIAL Our silicone grip ball is made of silicone material, which is healthy and environment-friendly, skin friendly, non-irritating and odorless, flexible, non-deforming after long-term use, and resistant to pulling. ERGONOMIC DESIGNThe hand grip for decompression exercises is ergonomically designed. Using this product, the five fingers can exert a balanced force during training, effectively preventing finger contractures and deformation, and at the same time, the product will not fall due to inflexibility of the patient's fingers. Frequent use of it will help improve the flexibility of the fingers and enhance the grip. DURABLE AND EASY TO wash It can be washed directly with water, then avoid exposure to the sun, and dry naturally in a ventilated and cool place.