Justrite Vertical Drum Polyethylene Pop-Up Gauge. Avoid overfilling drums and dangerous "run-overs" with a drum fill gauge. Price is for 1.
Drum gauge installs easily by threading into a standard .75" NPT bung hole and accepts any .75" faucet.
Rugged zinc plated, cast iron body stands up to heavy use. Heavy gauge glass tubing is protected with a chrome plated housing and permits use with non-viscous oils. Buna-N seals make this unit ideal for petroleum products.