Alto Sax 3.5 Rico Box 10 The Rico reeds are made from premium cane and are a popular choice among saxophonists of all levels. They are known for their consistency and are designed to provide a balanced sound with good projection. The 3.5 strength is considered to be a hard strength, making it a good choice for advanced players who are looking for more control and a darker sound. This strength can also be suitable for some intermediate players, depending on their personal preference and playing style. The Box 10 packaging refers to the number of reeds included in the package. In this case, there are 10 reeds in the box, making it a good option for players who want to have a larger supply of reeds on hand. Overall, the Rico reeds in 3.5 strength and Box 10 packaging are a great option for alto saxophonists who are looking for a balanced sound with good projection and prefer a harder reed for more control and a darker sound. However, it's important to note that every saxophonist's preferences can vary, so it's a good idea to try out different reeds to find the ones that work best for your playing style and needs.