The Krueger 16N529 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 from 0-100% and 0-10" to easily identify fluid levels. It has a 1/2" NPT thread connection and includes a locknut for secure installation. The gauge is made in the USA and is ideal for heavy equipment, industrial machinery, and manufacturing applications that require accurate fluid level readings. With its rugged design and dual scale, this Krueger gauge is well-suited for monitoring fluid levels in harsh environments.