Features: Compatibility: This temperature sensor is a replacement part for spa temperature sensors and is designed for use with hot tubs. It is a reliable hot tub heater sensor engineered to help maintain the desired water temperature in your spa system. Compatible Models: - J-270, J-280, J-355, J-365, J-375 (2007 and newer) - J-210, J-220, J-230, J-200 LED (2005 and newer) - J-325 (20052007) - J-335, J-345 (2004 and newer) - Del Sol (20032005) - J-320, J-330, J-340 (20022003) - J-300 LCD Series (2002 and newer) - J-350, J-360, J-380 (20022003) - J-355, J-365, J-375, J-385 (20042006) - All J-400 Models (20062009) - 880 Systems (2005 and newer) - 850 Systems (19972005 and 1997 and newer) - 400, 600, 600-S, 750, 800, 850 Systems - Suncoast (1992) - Suntub SVDV Systems (496498) This temperature sensor helps resolve common error codes such as OH or ICE on compatible spa control panels. Easy Installation: Disconnect the old sensor and connect the new spa temperature sensor by splicing the wires together and routing them back to the control board. Replaces Part Numbers: 6600-138, 6600-105, and is interchangeable with 6600-182 (stainless steel) with box end connectors. For inground spas without a skirt, refer to model 6600-169. Specifications: - Part Name: Temperature Sensor - Part Number: 6600-166 - Material: Non-woven fabric - Color: Black Package Contents: 1 x Temperature Sensor Note: The package includes only the temperature sensor. Other items shown are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement may vary by +/- 13 cm.