Strip Heater Heater Voltage 120V AC Terminals Offset Overall Length 17 7/8 in Mounting Dimension 16 7/8 in 500 W Watts Watt Density 12W/sq in Sheath Material Stainless Steel Material Stainless Steel Mounting Type Surface Mount Slotted Hole Length 1/2 in Slotted Hole Width 5/16 in 1 Phase Max Sheath Temp 1 200 Degrees F Screw Size 10-32 Standards UL Recognized Includes Mounting Tabs