Features: 1. Made Of High ABS Material, Durable. 2. Practise The Dexterity And Strength Of The Finger. Suitable For Guitar, Bass, Piano, Violin. 3. Hand Exerciser Grip, A Must Tool To All Music Players. 4. Safely And Conveniently Build Strength, Endurance, Flexbility And Coordination. 5. Comfortable Finger Pads And Allows You To Adjust Individual Finger Tension From Light To Heavy, Providing All-In-One Hand Fitness For Musicians. Description: 1.Material: ABS 2.Size: 9x8cm 3.Applicable Scene: Fitness Equipment, Fitness Package Include1 X Hand Grip Finger Trainer Notes: 1.Transition:1cm=10mm=0.39inch 2.Please Allow 1-3mm Error Due To Manual Measurement. Pls Make Sure You Do Not Mind Before You Bid. 3.Due To The Difference Between Different Monitors, The Picture May Not Reflect The Actual Color Of The Item. Thank You