The Krueger 16N570 is a liquid level gauge designed for use with hydraulic reservoirs and gear boxes. It features a polycarbonate lens and aluminum housing for durability. The gauge has a dual scale that reads in both inches and millimeters with a max reading of 8 inches or 200mm. It has a 1/2 inch NPT thread connection and includes a locknut for easy installation. The gauge allows the user to visually monitor fluid levels. With its rugged construction, dual scale measurements, and easy installation, this Krueger level gauge is well-suited for hydraulic fluid level monitoring in industrial machinery.