This is a convenient item that attaches to the soundhole of an acoustic guitar to reduce sound leakage. ✅ Recommended Points For nighttime practice: Reduces volume, considerate of neighbors and family. Easy to attach: Just insert into the soundhole without removing the strings. Gentle on the instrument: Soft silicone material will not scratch. Product Specifications Size: Outer diameter approx. 10cm Compatible with: General acoustic guitars, dreadnoughts, etc. Color: Black ※ Please Note [This is a new and unused item.] [Please understand that there may be minor scuffs due to it being an overseas product.] Please check the soundhole size of your guitar. Immediate purchase OK, late-night/early-morning purchase OK! Thank you.