GR Trumpet Mouthpiece 65S Silver Plated Slight signs of use. No dents, scratches, or peeling of the plating. GR mouthpieces are high-efficiency, well-balanced trumpet/flugelhorn mouthpieces developed by Gary Radtke based on acoustics and a unique algorithm. They are particularly popular in studio settings and for high-range playing, offering ease of blowing, accurate intonation, and a bright, warm tone, regardless of genre. Features: Scientific approach results in high efficiency and excellent operability, producing sound with less breath, extended note duration, accurate intonation, and consistent balance. Cup Inner Diameter: 16.50mm Shipping will be done in a cardboard box, carefully packed with cushioning material. Please refrain from excessive price negotiations. Please examine the photos carefully and understand that this item is non-refundable and non-returnable.