About this item NATURAL STONES Finger buttons encrusted with real minerals that have their own individual meaning and unique natural pattern Each stone was accurately handworked and will serve for years LACONIC AND DELICATE DESIGN PERFECT FIT Buttons available in stock for 2 trumpet brands and 100 match all models of the chosen instrument NEW OPPORTUNITIES FOR A BETTER AND WARMER SOUND Custom parts modify the sound characteristics of your instrument They perfectly work with KGUmusic trim kits allowing you to upgrade and customize the sound and response of the trumpet ONLY QUALITY MATERIAL Color Silver Plated Brand KGUBrass Finish Type Lacquered