Ultra-Pure Ultra-Light Valve Oil has a lighter and faster feel that players love. It is synthetic, odorless, and very long-lasting. Our Ultra-Light valve oil is thinner than the standard weight and is perfect for instruments with very tight pistons or rotors that would feel sluggish with the standard weight. We especially recommend this version for brand-new instruments, Schilke, Yamaha, CarolBrass, Monette, and Getzen and for the axial flow rotors of many trombones. It is also best for rotary valve trumpets and makes a great rotor oil on French horns.This style bottle has a child-resistant (push and turn) cap as required in the US and Europe.