This product delivers the ideal muting feel that bassists seek, creating a warm tone that can't be achieved with anything else. It doesn't just suppress the sound value; it optimizes the timing, length, and strength of the string vibration decay for each string 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, the warm sound reminiscent of vintage sounds can be reproduced simply by using it, regardless of phrases, genres, or skill level. The crisp sound is also incredibly pleasant, and just playing at home will allow you to rediscover the "joy of playing bass." Installation is very easy: simply compress the product firmly like an earplug and insert it under the strings before it regains its shape. By moving it towards the bridge or neck after installation, you can create subtle nuances and gradations according to your preference. Please find your ideal sound. Size (approximate): Width 80mm x Height 28mm x Thickness 20mm * The brown part may discolor over time, especially when exposed to ultraviolet light, but this is a product specification and does not affect the quality. * Please check before purchasing to ensure there is enough space to install it on your instrument. * Partial crushing immediately after opening, and hardening of the product in low-temperature environments, which intensifies the effect, will return to its original state at room temperature. * The degree of effect varies depending on the instrument's setup. * Because the logo is printed by hand one by one, there may be variations in density, blurring, and rubbing on the printed part, unlike the image. * Instruments and equipment included in the images are not included in the product. * Please be sure to refer to the instruction manual at the end of the product images or on the back of the product package for usage instructions. We offer two types of lineups, sweet and better, for each sound character, available for 4-string and 5-string basses. Please see each product page. Although we have made detailed designs specifically for 4-string and 5-string basses, they can be used regardless of the string spacing differences.