Description: The Guitar Finger Trainer is perfect for those beginning to use a guitar. Tension Range: 2.5-6lbs Good for: beginners and pros Strength and flexibility training Colors: Black Pianists and guitar players This could also work for a pianist learning to build up strength and reach with your ring and little fingers. This is also great for professional or experienced players to increase strength and flexibility. Size Chart: Size: 90 x 80 x 20mm Package Includes: 1pc Guitar Finger Trainer