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Compatible Replacement: Serves as a direct alternative to the Honeywell L641A1039 Cylinder Thermostat for hot water systems Temperature Range: Features an adjustable dial with clearly marked settings from minimum up to 80°C for precise hot water control Complete Kit: Includes the thermostat unit, cylinder strap with hooks, mounting screws, and a protective cap for easy installation Durable Construction: Compact, robust housing with metal back plate and strap for secure cylinder mounting and long-lasting performance Safety Certified: CE and UKCA marked to meet relevant safety and performance standards required for use in the UK and Europe