6600-166, Sundance Spas Short housing temperature sensor with curled finger connectors: A. 2006+ 780/680 Series B. 2005 780/850E System, Portofino, and Sweetwater C. 2003-2005 Del Sol System D. 1998+ Solo, 701, and 724 Systems E. Replaced 6600-070 sensor (not shown) F. 6660-215, Guard sensor cover, gray used with part #6600-166 on all 680 Series
