This light rotor oil is perfect for tighter rotary valve tolerances.
Monster Oil is home to the cleanest synthetic brass lubricants currently on the market. The company was started by 3 professional trumpet players who collaborated with an aerospace lubricant firm. Together, products that were originally used by NASA were reworked until they were perfect for brass instruments. The result is a line of products that are designed to clean, protect and lubricate instruments all at the same time.