1. Material: TPE2. Weight: about 100g/piece3. Size: about 10x4 cm/piece4. Purpose: enhance grip strength, exercise fingers, move hands, rehabilitation training, release stress, etc.5. Features: easy to use, safe and environmentally friendly materials, comfortable to the touch, moderate strength, wear-resistant and durable

http://olla.gr/2-pcs-finger-rehabilitation-training-device-eight-hole-gripper-for-emotional-vnting-and-pressure-relief-gripper-blue/