.2. 1.5,2.0,2.5,3.0,3.5,4.0 saxophone reeds have a growth period of more than two and a half years. It is not easy to be deformed.3. Each piece is consistent in size, it can create a more stable sound4. Hand-picked, made by digital reed technology that promotes excellent response across all registers5. The reeds are naturally air-dried for more than two years6. You can prepare a few reeds for change, which can effectively extend the life of alto saxophones. Description:Strength: 1.5,2.0,2.5,3.0,3.5,4.0 (optional)Color: as shown in the picture Material: Reed Weight: 30g Package Included:10 x ReedNote: Please refer to the measurement. A small measurement error is acceptable within the normal range. There may be a slight color difference due to monitor, camera or other factors, please refer to the physical item.