Features: Compatibility: This temperature sensor is a replacement part for spa temperature sensor – fits hot tubs. The temp sensor is a reliable hot tub heater sensor designed to help your spa system maintain the desired temperature. Temp Sensor Use for Hot Tub – Compatible with 2007+ J-270, J-280, J-355, J-365, and J-375 models; 2005+ J-210, J-220, and J-230; J-200 LED models; 2005–2007 J-325 models; 2004+ J-335 and J-345 models; 2003–2005 Del Sol models; 2002–2003 J-320, J-330, J-340 models; 2002+ J-300. Solve Water Temp Problem: This hot tub temperature sensor helps fix error display issues such as OH or ICE on Sundance spas and other compatible hot tubs. Easy Installation: Cut off the old temperature sensor in the hot tub and tape the old wire to the new spa temperature sensor wire, then feed it back to the control board. Temperature Sensor Compatibility: Suitable for models such as (2012+), 880 Systems (2005+), 850 Systems (1997–2005), 400, 600, 600-S, 750, 800, and 850 Systems. Also compatible with Suncoast (1992), Suntub SVDV Systems (496–498), and 850 Systems (1997+). Replaces #6600-138 and 6600-105 (not included). Interchangeable with 6600-182 sensor (stainless steel) with box end connectors. For inground spas without a skirt, refer to 6600-169. Designed for J-300 LCD Series (2002+), J-350, J-360, J-380 (2002–2003), J-355, J-365, J-375, J-385 (2004–2006), and all J-400 Models (2006–2009). Part Name: Temp Sensor Fitment: 6600-166 Material: Non-woven fabric Color: Black Package Contents: 1 x Temp Sensor Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allows an error of +/- 1–3 cm.