The Blue Juice Valve Oil Fast Action in green petroleum is a lightweight 2 oz valve oil specifically designed for brass instruments such as cornet, bassoon, tuba, euphonium, baritone, flugelhorn, alto horn, French horn, and trumpet. Made by the brand Bluejuice, this valve oil is known for its fast action formula that helps maintain and improve the playability of brass instruments. Its blue color adds a unique touch to the product, making it easily identifiable for musicians on stage or in practice sessions. Perfect for keeping your brass instruments in top condition, this valve oil is a must-have accessory for any musician's gear collection.