Honeywell Aquastat W/ 100 F To 240 F Operating Temperature 5 F Fixed DifferentialHigh or Low limit Aquastat Controller with 100 F to 240 F operating temperature and 5 F fixed differential. Made in the USA Product Specifications BRANDHoneywell LENGTH INCHES2-7/8 DIAMETER INCHES3/8 CAPILLARY LENGTH INCHES1-1/2 WELL SPUD SIZE INCHES1/2 NPT 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 NUMBERL4006A1009