It can increase the force area and reduce the impact force when the racket is subjected to high tension Increase the area with the racket to avoid breakage and deformation of the racket when threading Made of high quality material, lighter and more environmentally friendly Place the protector at the 12 clock and 6 clock positions of the racket when using it This product is suitable for a of common big of badminton stringing machines. colour:Blackandwhite Material:PP size:Approximately 3 x 2 x 2cm Package Contents: 2 x white racket reducer 2 x black racket reducer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.