‎Red, Yellow, Blue, Orange

【Quality Material】The exercise balls are made of high-quality thermoplastic rubber (TPR) and food-grade silicone, which keep it’s original shape after repeated squeeze and stretch
【Portable kit】This kit is suitable for anyone to exercise the hands at anywhere no matter you are sitting at home watching TV, walking on the way, or in a lunch break in the office
【Effective Functions】By using the hand grip balls and finger stretchers to improve hand strength, finger dexterity, joint flexibility. These also can be used to assist injury recovery, ease muscle pain, and relieve stress