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The Hetman synthetic lubricants are about the best lubricating products available for brass or woodwind instruments. They have a broad range of products for piston and rotary valves as well as trombone slide lubricants.

Hetman 13.5 Medium Bearing & Linkage Synthetic Lubricant Specifications:

HET1: Light piston oil - possibly the best oil for newer horns or horns with Monel valves. If your valves are hanging up after you oil them with another product, switch to this.
HET10N: Synthetic grease syringe style - a heavy grease in a syringe applicator, for use on various parts to keep them moving properly.
HET11N: Light Rotor oil - Long lasting synthetic oil formulated specifically for new instruments. Has a precision needle oiler.
HET12N: Rotor oil - For standard rotary valve that do not have too much wear. Comes in a precision needle oiler.
HET13N: Light bearing oil - for newer horns with tight rotor bearing areas. Comes in a precision needle oiler.
HET13.5N: Medium Bearing & Linkage - This heavier formulation works well for spherical rod end bearings ( "Minibal" or "Unibal") linkage joints, cross joints and lever hinges.
HET14N: Bearing and Lever oil - for paddle pivot points and lever bearings to help keep them clean and moving quickly.
HET15: Ball Joint oil - specifically designed for valve linkage bearings like miniball linkage bearings or other styles of bearings.
HET2: Standard piston oil - works well with all brands and types of piston valves once you are past the "break-in period".
HET20A: Spray Applicator Bottle for the Hydro-Slide lubricant.
HET20C: Hydro-Slide Trombone Slide Lubricant - a sprayed on solution mixed from concentrate to meet your specific tastes in trombone slide speed.
HET3: Classic piston oil - for horns with a little mileage on them. Slightly thicker to help seal any gaps that may be present due to wear over time.
HET4N: Light tuning slide oil - for tight slides or ones that you need to be able to adjust smoothly and easily "on-the-fly".
HET5N: Tuning slide oil - a thicker version of slide oil for tuning slides that need to be able to be moved, yet must also stay in place once put into proper position.
HET6N: Heavy tuning slide oil - for older horns or horns with loose slides. This oil helps keep those pesky slides from moving on you while you play. Will not break down as it gets warmer.
HET7N: Heavy bodied tuning slide oil - comes with brush cap applicator for tuning slides
HET8N: Slide grease
HET9N: Ultra slide grease - Extra heavy for loose slides
HETHBB: Brass Brite Aerosol Degreaser - For maintenance and cleaning of metal parts; dissolves other valve oils to clean the surfaces; removes lapping compounds and lubricants; contains no fluorocarbons