This is the stainless level one level indicator model. The construction is stainless steel wetted rods with HDPE floats. Other options are available for increased compatibility with various liquids. With a .75" opening, the floats are made of Nitropyll.
This liquid level indicator is made specifically for standing and horizontal barrels. We can accomodate 55, 30, and 15 gallon drums, and we offer the barrel indicator multiple materials of construction to accomodate nearly any type of liquid.