BERP Bio Rotor Oil #5 - Medium

BERP BioRotorOil No. 5 is a petroleum-free rotor oil designed for rotary valve instruments, including French horn, trombone, euphonium, baritone, trumpet, and tuba. It is meant for the inside of rotor valves where a dedicated rotor oil is needed to help maintain smooth, quiet valve action.

This is a good option for players and repair shops looking for a bio-based alternative to traditional rotor oils. Use it for routine rotor lubrication, while saving thicker bearing or linkage oil for the external moving parts of the rotor mechanism.