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ABS Guitar Piano Guitar Finger Exerciser Power Trainer Handle Grip Exercise Gym Workout
Features:
1. Medium in size, perfect in feel and easy to carry.
2 visual adjustment, adult MF4-1 (3-7 lbs), children 
There are 3 soft silicone protective layers on the bottom and top for a comfortable touch, non-slip and non-slip.
4. Each button is flexible, not loose and durable.

Specifications:
Material: ABS
Colour: Black,

Packing list:
Adult finger trainer *1