Natural Lube 1000 Plus "Bore Butter" IN A Tube (5oz) - Manufacture ID: 7309A biodegradable all natural lubricant which contains no petroleum-based oil or additives. Reacts differently (chemically) to the combustion of black powder producing far less "tar like" fouling. 5oz tube ideally suited for easy application on patches. Also can be used to field lube bullets. Excellent rust preventative on external surfaces of any firearm.Warranty: Limited lifetime warranty covers the product through the lifetime of the original purchaser except in the case of obvious abuse or neglect.