Tapmatic Natural Cutting Fluid is a biodegradable formula with a high performance lubricating ability. It eliminates galling, seizing and extends tool life. Natural is non-toxic, non-hazardous and biodegradable. It will not irritate the skin, eyes or respiratory tract. Natural does not contain sulfur, chlorine, chlorinated solvents, water, mineral oil or inactive fillers. It is safe on all metals. NSN Number is 9150-01-450-5693.