• Flame-retardant PC material shell, durable and wear-resistant. • Internal use of brass valve body, high temperature and corrosion resistance. • Smooth plastic surface without burrs. • Anti-freeze and adjustment function with liquid sensor. • No fixed temperature adjustment range. • Easy installation: remove the old valve, set up the new thermostat, and place it. • M30 x 1.5 threaded connection, suitable for various heating equipment. • Check thermostat head compatibility before purchase.