This product was created to produce a warm tone that cannot be achieved with anything else, offering the ideal muting sensation that bassists seek. Instead of simply shortening the note duration, we have optimized the timing, length, and strength of string vibration decay for each string count and product type. Muting techniques as a playing style have been difficult to use for fast phrases or certain music genres. However, with this item, you can reproduce the warm sound reminiscent of vintage sounds simply by using it, regardless of your playing style, genre, or skill level. Furthermore, the crisp sound is extremely pleasant, and you will rediscover the "joy of playing bass" just by playing at home. When attaching, simply crush the product firmly like an earplug, insert it under the strings until its shape returns, making it very easy. By moving it towards the bridge or neck after installation, you can also create subtle nuances and gradations according to your preference. Please find your own ideal setting. Size (approximate): Width 95mm x Height 34mm x Thickness 20mm *Discoloration of the brown part will progress over time, especially when exposed to ultraviolet rays, but this is a product specification and does not affect quality. *Please confirm before purchasing that you have sufficient installation space on your instrument. *Partial crushing immediately after opening, and hardening in low-temperature environments will tend to strengthen the effect, but the product will return to its original state at room temperature. *The degree of effect will vary depending on the instrument's setup. *Since the logo is printed by hand one by one, the printed area may have variations in density, bleeding, or smudging compared to the image, and each item will differ. *Instruments and equipment shown in the images are not included. *For usage instructions, please refer to the end of the product images or the instruction manual on the back of the product packaging. We offer two types, "sweet" and "better," categorized by sound character, for both 4-string and 5-string basses. Please check each product page. Although each 4-string and 5-string model is finely and specifically designed, they can be used regardless of string spacing differences.