Description: Set of 2 vibration peners for tennis/squash racquet. Made of eco-friendly premium silicone material, safe and no harm. Add a little fun to your racquet with a racquet vibration pener that reduces the risk of tennis elbow. Easy installation, pracrical and durable. A great gift for tennis players. Specification: Material: Silicone Color: you can pick Length: Approx. 10.4cm / 4.1 inch Package Includes: 2 Pieces Tennis Vibration peners