specification: Item Type: Finger Strengthener_x000D_Product Size: Approx. 8.5cm / 3.3in_x000D_Hardness Blue 30 Pounds: Intermediate Grip Recovery_x000D_Hardness Purple 40 Pounds: High Level Grip Recovery_x000D_Applicable People: For Working Party, Mobile Party, Student Party, Rehabilitation Training, Fitness People, Middle Aged and Elderly People Features: 1Added a high raised dot, which exercises grip strength while deeply stimulating the disaster positions in the palms. 2Annular design fits the palm of the palm, so that the force of the hand is even, the force is comfortable, and the elasticity is plentiful. 3Best performance, comfortable and durable, perfect design, suitable for your hands or fingers, the product can be washed. 4Deeply stimulate the palm and fingers, which is conducive to the flexibility of the hand, and can be used for decompression, play and other functions. 5Applicable people, working party, mobile party, students, rehabilitation training, fitness people, middle aged and elderly people. PackageList: 1 x FingerStrengthener