Manufacturer: Kimony Quake Buster QUAKE BUSTER Product Number: KVI205 Color: WH (White) White Also used by Kei Nishikori This is a mushroom magic vibration dampener. It reacts according to the strength of the vibration and the string's response. A new type of vibration dampener with outstanding effectiveness. This is an original Kimony product that has perfected Mushroom Magic, the world's first to absorb vibrations in all 360 directions, based on highly efficient damping theory. Available in 17 colors. ① White ② Black ③ Red ④ Blue ⑤ Yellow ⑥ Orange ⑦ Green ⑧ Clear ⑨ Gold ⑩ Blue x Yellow ⑪ Blue x Pink ⑫ Green x Purple ⑬ Black x Red ⑭ Red x Green ⑮ Red x Blue ⑯ Red x White ⑰ Sakura Shipping: Postal letter (mailbox delivery) ★ Immediate purchase without comment is OK.