• Advanced / LA Spas flo-thru heater assembly
• RMF Part # C2550-0739
• 5.5 KW 240V
• 2 in. x 15 in.
• Single groove Thermowell, cover & gasket
• 2 in. solid nut tailpiece, 2 mounting studs

this unit can be used on any spa that has 2" plumbing and that is 15' in length.  must be 240 volt and 5.5kw.