The At-A-Glance liquid level gauges are designed for use with drums and tanks to indicate liquid level at a glance. They feature a clear polycarbonate body with bold, easy-to-read level markings and a variety of connection types including bung, flange, and thread mount. The gauges allow quick visual monitoring of liquid levels in drums up to 55 gallons. They are available in 10", 12", 16", 18", 24", and 36" lengths to accommodate different tank heights. The gauges are made in the USA and are compatible with water, oil, chemicals and more. They offer economical, maintenance-free liquid level indication.