Advanced Spa/LA Spas Stainless steel replacement heater assembly. 2" x 15" with 1/8"npt pressure switch tap at 180 degrees from the heater terminals, 5.5kW/230v, (2) 2" solid nut tailpiece, (2) 1 -32 x 3/8" mounting stud, single groove thermal well cover & gasket. Pressure switch not included