Valve, slide, and key oil. Compact bottles that will fit in any brass case. Used from beginners to professionals. Great for marching band. Two 2.0 fluid o.z. bottles of valve oil.
My analysis of this product showed that it's an excellent lubricant for industrial equipment's valves... It keeps them functioning smoothly and without any issues. The packaging is also perfect and convenient. However new users may have a hard time getting the hang of using it, but it`s nothing that a quick tutorial can't fix..
My son is taking trumpet lessons. He regularly lubricated the valves, but they were constantly sticking or moving sluggishly. His mentor, a professional trumpeter, recommended Cass Valve Oil. He was right. Goes fast and doesn't get stuck.