Our Hydraulic and Lube Oil Heaters are made for heating oils used in fluid power and machine lubrication applications. With low watt densities, these Hydraulic Heaters are designed to allow direct immersion into lubricating oil and hydraulic fluids. Features include: 120/240 VAC Field Selectable, (2) 0.475” Diameter Steel Elements, NEMA 1 Heavy Gauge Cylindrical Terminal Housing c/w ¾” Conduit Opening, 2” NPT Steel Screw Plug, Internally Adjustable Tamper Proof Thermostat (60 – 160˚F), CSA