Hetman Light Rotor Oil (#11). For horns with very tight valves.
Rotor Lubricants: Hetman® Synthetic Rotor Lubricants provide for long-lasting rotary valve performance. These lubricants will protect rotors and valve casings against corrosion and wear while improving valve seal. Hetman® Synthetic Rotor Lubricants will not swell rubber bumpers or damage plastic components. The 22-ml long-tipped precision needle oiler facilitates application through the slide tubes.
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Worked as it was intended to do. My order came fast.