EuroSonic concentrate exclusively from EURO TOOL is an advanced technology, bio-friendly ultrasonic cleaning solution containing thousands of enzymes which will remove body oils, debris, rouges and grime accumulations from metals, stones and other materials. You've seen biodegradable cleaners before which lack the cleaning power of good old ammonia. Trust us on this one, EuroSonic contains no phenols, ammonia, sulphur or nitrites and is non-toxic, biodegradable and requires no hazardous shipping. Our best cleaner - MSDS approved. Try it - it really works! Mixes 30 TO 1. 1 quart included.