ReSURGE Instrument Cleaning Solution 1L / 33.8 oz. (makes 67 gallons). Unique formula helps protect your instruments' passive layer (outer coating), reducing the potential for stains, spots and even rust. Neutral pH, biodegradable and environmentally friendly. At only 1/2 oz. per gallon dilution, it's economical and uses less chemistry. 33.8 ounce bottle of concentration