Honeywell High Low Limit Aquastat ControllerHigh or Low limit Aquastat Controller with 100 F to 240 F operating temperature and 5 F to 30 F adj. differential. Product Specifications BRANDHoneywell LENGTH INCHES2-7/8 DIAMETER INCHES3/8 CAPILLARY LENGTH INCHES3 TEMPERATURE CONTROL RANGE °F100 to 240 SWITCH TYPESPST, contacts break on temperature rise APPLICATIONHigh or Low limit DESCRIPTIONHigh or Low limit Aquastat Controller LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERL4006A1678