Soft and high-quality rubber material, strong and durable, avoiding frequent replacement, and practical. Easy to insert, just put it into the water for 20 seconds, and then put it into the F hole after taking it out, which is convenient to use. Avoid dry damage such as cracks, poor rope movement, buzzing, protruding thread ends, sedimentation, etc. violin humidifier for violin and is made of soft latex material, easy to use and to you for a long time. Features: These violin humidifiers can effectively humidify violins and violas, effectively avoid various problems caused by dryness, and are perfect choices for musical instrument maintenance. Colour:white+green Material:rubber Size: 30cm Package Contents: 2 x violin Humidifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.