The violin humidifier is made by rubber materials for safe and durable long time use. Easy to use, get the perfect violin humidity and violin sound. Light weight and portable, easy to carry and storage, a good helper for you. Features - Color: Green - Material: Rubber - Size: About 31.00X0.60X0.60cm/12.18X0.24X0.24in - and convenient violin humidifier accessory to maintain the of the equipment. - Soft and premium rubber material, strong and durable, avoid frequent replacement and practical. - Easy to insert, just put in water for 20 seconds, take out, and put in F hole, convenient to use. - Prevents cracking, poor string action, buzzing, protruding wire ends, top settling and other damage from drying. - You can buy one for your good friends or family members who are learning violin. Package list: 1 x violin humidifier