Hetman 10 - Musical Instrument Grease Multipurpose brass and woodwind lubricant for flat springs and tracks, pivot screws, wing/neck screws, joints, linkage, hinges, levers, valve stems and caps, and screw bells Guards against wear and corrosion Waterproof synthetic Plastic-safe All Hetman Musical Instruments 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