SAME DAY SHIPPING. REFURBISHED M7 HEATER TUBE.  CONDITION MAY VARY FROM PICTURE, BUT INCLUDES SPLIT NUTS, 2 NEW FLAT GASKETS, 2 TAIL PIECES, NEW HEATING ELEMENT, AND TESTED SENSORS - GUARANTEED TO WORK PERFECTLY.  MAY SHOW SOME SIGNS OF WEAR ON STAINLESS, BUT IS IN GREAT CONDITION OVERALL.  WE INSTALL THESE EVERY DAY ON SERVICE CALLS. EXACT PART NUMBER MAY VARY BUT FITS 95% OF BALBOA CONTROL PACKS. (ALSO WORKS WHEN CIRCUIT BOARD IS CONVERTED TO 110V AT 1.5KW)  EASIER ON CIRCUIT BOARD THAN A 5.5KW EXTENDING ITS LIFE. NO REAL DIFFERENCE IN HEATING TIME, AND LOWERS YOUR ELECTRIC BILL.