Frankford Arsenal Brass-Cleaning Solution was scientifically formulated to remove carbon buildup, tarnish, and oxidation on brass quickly and efficiently. Specifically designed to be used with Frankford Arsenal's line of Ultrasonic cleaners and rotary tumblers. Solutions are so potent, they can be used for multiple cleaning cycles before having to mix another solution. 40:1 mix ratio.Manufacturer model #: 878787. Removes carbon buildup, tarnish, and oxidation Works quickly and efficiently Use for multiple cleaning cycles Mix at a 40:1 ratio