Product Specifications Model: Diamond Material: Crystal glass Tip opening: 1.25 mm Facing length: 20 mm Features: Extra-wide opening (Open+), designed specifically for use with soft reeds to achieve a full, powerful sound. Ideal for orchestral and classical musicians. clarinetandflute.com +3 If you'd like, I can help you with the following: Checking availability and current prices for this model in music stores. Comparing the Diamond model to other Pomarico variants (e.g., Emerald, Ruby, Sapphire). Choosing the right ligature for crystal mouthpieces. Used in very good condition please check pictures