1,Exercise your fingers and arm strength,size of grip ball is small, just in hand, hold grip ball in hand. 2,Pinch down hard and feel pressure on your fingers from grip ball,generally continue to hold N times, can feel hand tingling fever, after is very comfortable feeling. 3,Ball can effectively stimulate various acupoints of the hand, promote blood circulation,achieve effect of exercise and healthy care. 4,Made of high quality silicone material, durable and long service life. 5,With imported elastic belt, it can prevent slipping and carry easily. 2 x Silicone Hand Grip Balls Condition: 100 percent Brand NewItem Type: Silicone Hand Grip BallsMaterial: SiliconeOptional Color: Yellow 15 Degrees,Orange 20 Degrees,Red 25 Degrees,Blue 30 Degrees,Green 35 DegreesQuantity: 2PCSProduct Care: To Extend Service Life, It Is Recommended To Wash Gently With WaterCharacteristic:With Imported Elastic Belt, It Can Prevent Slipping And Carry EasilyWeight:Approx.110g or 3.9oz Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. YJL official store