Conn Selmer’s newest innovation in instrument oils is here. Synthetic+ improves upon the industry standard synthetic instrument oils with a faster, longer lasting, and more protective lubricant. Bach and Conn Synthetic+ oil is the top choice for all musicians and provides smooth and quick action for valves and rotors. Available in a compact and convenient 1.6 oz. squeeze bottle the new Synthetic+ Oils are a must-have for any brass player. Synthetic+ is specifically formulated to protect and minimize wear on brass instruments by fighting corrosion and oxidization.