Ultra-Pure Professional Valve Oil has a fast, light, and silky-smooth feel that players love. It is synthetic, odorless, and very long-lasting. Our Professional valve oil is the standard weight and is perfect for most instruments. It works well on pistons and rotors. This big refill bottle can fill your smaller bottle 4 times or more. It comes with a child-resistant (push-turn) cap and a dispensing flip-top cap. When you purchase this refill bottle from our website, we also include a free empty 2-oz bottle, cap, and 4 dropper tips for easier refilling.