TheUltrasonic BrassCleaning Solution was scientifically formulated to quickly remove carbon buildup tarnish and oxidation on brass.It wasalso specially designed to be used with The Frankford Arsenal line of Ultrasonic Cleaners. Our Cleaning Solutions are so strong that they can be used for multiple cleaning cycles before having to mix new solution up. Get the best cleaning results possible with the EZ Sonic Cleaning Solutions! 32oz bottles.40:1 mix ratio.Scientifically formulated solutions for brass and gun parts.