JFGLORIX Hand Exercise Balls Finger Strengthener Therapy Hand Balls Finger Exerciser Balls Finger Stretching and Rehabilitation Training for the Elderly 6 Piece Set.Brand: JFGLORIX Color: yellow and blue Features: Different Strength CombinationsThis finger exerciser balls set is a 10 pound and 20 pound combination. Contains two grip balls and two finger tension bands of different strengths. Grip balls and tension bands of different strengths can be combined at will to adapt to different groups of people and finger training at different stages. Detachable for independent useThe grip ball can be used independently