Keep track of your tank levels with Manual float-type level gauges. The manual float gauges are easily installed in any 2" top opening, giving you an instant level of the double-walled tanks.
- PVDF
- Level listed in 1/8, 1/4, 3/8, 1/2, 5/8, 3/4 & full in an easy-to-read format
- Level gauge for 90 gallon Gemini™ tanks 3979 & 3980.