Weight: 69 g Packing: color cards Size: diameter 9cm Material: silicone rubber QTY/CTN: 250 pcs 1. 100% silicon rubber, non-toxic.2. Soft, smooth, flexible,and waterproof.3. Stable property even down -40°C,flame retardancy and easy to clean.4. Product surface and edge smooth processing.5. Can be used in the headset walkman,mp3,mp4,mp5,ipod and etc.6. Fashion design, good for promotion gifts,toys, ...