WEICHUAN 3PCS Set Hand Gripper Grip Silicone Ring Resistance Strength Trainer Exerciser Three pieces set,which includes 30lb, 40lb and 50lb hand grippers. Material--The grippers are made from premium silicone, the high Sized especially for adult hands, to maximize the benefits of the exercise an These rings are great for training athletes, and giving their performance a positive boost. Fit for men and women