Item Type: Tennis Racket Shock AbsorberMaterial: Silica gel and steelGross Weight: 11g/0.39ozColor: Brown, fluorescent yellow, white, black, one for each 1Practical: This tennis racket shock absorber can help the racket absorb the vibration of the wire and the racket frame at the same time when hitting. 2Principle: Tennis dampeners' shock absorption principle is that the metal buckle mass suspended in the middle of the silica gel produces vibration to offset the shock of the racket frame and the impact of the line when hitting the ball. 3Multi Color Matching: These tennis racket vibration dampeners are multi color matching, which have more beautiful appearance. 4Silica Gel and Steel: Our tennis dampeners kit is made of premium silica gel and steel material that is sturdy, durable and has long service life. 5How to Use: First, find the midpoint of the two vertical lines from the bottom to the middle, then wrap one end of the silica gel on a vertical line, then align the hole of the silica gel with the metal buckle and put it on the metal buckle with force, and finally do the second and third steps on the other line.