The Horn Guys - J. Meinlschmidt 11 Synthetic Rotor Oil
Order your custom Marcus Bonna case through February for delivery in May. The (delayed) chaos tariffs don't include brass instruments or non-USA-made items, yay!
A durable synthetic oil, specially formulated for instruments with rotary valves. Guarantees fast response and smooth operation. Protects against corrosion and wear. Compare to Hetman.