Roche-Thomas Premium line of lubricants are formulated and bottled in our facilities using a special filtering process that eliminates impurities and residue. Our unique process insures that you receive a fast-acting lubricant with a clean coat which is virtually dust and lint-free. This is our newest and finest oil blend. It replaces our old valve oil, slide oil, and rotary valve oil. This new blend is has been formulated to perfection. It has the perfect blend to make your instrument flow smoothly without residue resistance, die additives, or other gimmicks our competitors try to use. Priced right for all musicians; formulated for the professionals. Our valve/slide oil comes in a 2oz cylinder bottle with a leak-proof one-piece cap that has a controlled dropper tip. Here at Roche-Thomas we are proud to say that ALL aspects of our products are manufactured in the USA!