There’s nothing worse than sticky and scratchy valves. That's why brass players rely on Hetman #3 Classic synthetic piston valve oil to keep their valves playing smoothly. This valve oil is specially formulated to lubricate the piston valves of classic instruments with vintage tolerances and greater than average clearance. The oil lasts longer and provides consistent non-gumming lubrication; it also protects from wear and corrosion, saving you time and money at the repair shop. Hetman #3 Classic synthetic piston valve oil is safe for use with Monel, stainless steel, and nickel-plated pistons.