Hetman Bearing & Linkage Lubricant combats the stresses and wear on rotary valve spindle bearings, levers, and linkage components. Will not swell rubber valve bumpers or damage plastic ball joints.All Hetman Musical Instrument Lubricants offer superior lubricating qualities, are longer-lasting than other lubricants, and are completely compatible with conventional petroleum-based lubricants, thereby avoiding potential gumming problems. The viscosity of each lubricant is carefully formulated for its specific purpose and assures both fast, positive action and vital protection against wear and corrosion.Bottle comes with precision needle oiler for convenience.