The Sundance Spas 6000-156 flo-thru heater assembly has the following features and specifications.
Series: 60Hz (but not limited to, unless specified otherwise above).
Stainless Steel: Yes
Heating Element Included: Yes
Kilowatt Rating: 5.5KW / 1.375KW
Voltage Rating: 240V / 120V
Mounting Studs: Yes
Number of Mounting Studs: 2
Temperature Sensor Included: No
Hi-Limit Sensor Included: No
Pressure Switch Included (A.K.A. Flow Switch): No
Number of Threaded Taps: 1
Threaded Tap Location(s): Pressure switch tap 12 O'Clock.