This is a vibration dampener for tennis rackets. Reduce vibrations. Help to minimize the vibration of your racket while providing excellent arm comfort. Provides more comfort while playing. Exquisitely slim and manufactured to optimize your tennis game! Lightweight, effortless and powerful. Features -Material: Silicone -Size:10.30X1.20X0.30cm/4.05X0.47X0.12in -Tennis dampeners help to reduce Tennis elbow. Tennis elbow is a nagging injury and very common among tennis players. -Reduce vibrations. Help to reduce the shocking of your racket while providing excellent arm comfort. -Provides more comfort while playing. Exquisitely slim and manufactured to optimize your tennis game! -This gives you more feel when hitting tennis balls. Many players report that they have more confidence hitting more varied shots. -With simple and convenient design, it can last for a long time of use. Package list: 4 x Tennis Racket Bumpers