Made of high-quality PVC material, lightweight and environmentally friendly. Increases the contact area with the racket to help prevent breakage and deformation during stringing. Helps distribute force and reduce impact when the racket is under high tension. Place the protector at the 12 o'clock and 6 o'clock positions of the racket when in use. Suitable for a variety of common badminton stringing machines. Specifications: Material: PVC Size: 1.4 inches / 35 mm Center Rectangle Hole: 0.2 x 0.4 inches / 6 x 10 mm Colors: Blue, White, Black, Red Package Includes: 1 Piece Tennis Racket String Holder (8 Pack) Note: Color may vary slightly due to monitor color calibration. Slight measurement deviations may occur due to manual measurement.