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, virtually dust and lint free. Our premium bore oil is a superior blend that won't harm your instrument. Bore oil by design is a heavier oil then valve\slide oil. Priced right for all musicians; formulated for the professionals. 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 so you konw you are purchasing the finest products on the market.