【For Sundance Spas Models】: 2012+ Aspen. 2005+ 880 Systems. 1997-2005 850 Systems. 400,600,600-S,750, 800 and 850 Systems. 1992 Suncoast, 4/96-4/98 Suntub SV/DV Systems. 1997+ 850 Systems. Replaces #6600-138 and 6600-105(not shown). Interchangeable with 6600-182 sensor (stainless steel) with box end connectors. For Inground Spas (spas with remote equipment with no skirt) see 6600-169. 【For Jacuzzi Hot Tub Models】: 2002+ J-300 LCD Series 2002-2003 J-350, J-360, J-380 2004-2006 J-355, J-365, J-375, J-385 All 2006-2009 J-400 Models. .