Product Size: 9 * 7.5 * 2.2cm Color: all black, green and white, off-white Material: PP + TPR Package content: 2 * gripper Humanized design finger trainer guitar, ideal for athletes and musicians. Provides a comprehensive strength training solution to develop and maintain the strength and dexterity of your fingers, hands, wrists and forearms. Promotes finger strength, flexibility, coordination and speed. 2.High quality finger trainer guitar with solid structureFinger trainers are made of a high quality, high quality spring,soft silicone handle and button caps, are comfortable to hold and easy to trian, do not hurt your fingers, are durable and have a longer lifespan than others Finger trainer occupational therapy. 3.Adjustable Tension Finger Climbing Trainer for Individual Finger The Climbing Hand Trainer offers custom conditioning for individual fingers and offers resistance on each finger to meet all of your training needs and an all-in-one Ensure hand fitness. 4.Extremely portable design finger trainer piano, easy to carry. You can carry it in your luggage, bag, purse, purse, etc. The slim size allows you to hold everything in the palm of your hand and make it portable for exercising your fingers whenever you want. 5.Ergonomic design: These hand trainers are equipped with an ergonomic palm grip, which offers you individual conditioning for individual fingers, the entire hand, the wrist and the forearm, is safe and convenient to use