SAFETY Sight tube is totally enclosed on three sides by a metal frame and on the front with a clear polycarbonate shield. ONE PIECE ASSEMBLY One continuous gauge provides total visibility of the liquid level in the tank (25′ / 7.62 meters maximum length). No stacking of gauges is needed because of this design. ECONOMICAL One Liquid Level Gauge per tank with two valves gives the full view of the liquid level in the tank. (KENCO KTV Valves must be ordered separately) EASY TO INSTALL Remove the broken gauge glass from the stuffing box of the valve. Insert the 5/8″ or 3/4″ metal nozzles into the existing valves. The stuffing box seals around the metal nozzle, not the glass. VOLUME AND HEIGHT SHIELDS The Polycarbonate shield can be supplied with various scales indicating height in inches, calibration rate, or tank volume. Refer to the Specifications tab to see the assortment of standard shield options.