General description The 4PCS Radiator Thermostatic Head is designed for efficient temperature control in home and office heating systems. Made from high-quality plastic and alloy, these thermostat heads are durable and resistant to deformation. They feature a user-friendly design with five modulation levels, allowing for easy installation and operation. Technical specifications Thread size: M30 x 1.5 Modulation levels: 1-5 Frost protection: Yes Suitable for: Water, non-corrosive liquids, and non-flammable gases Compatibility and accessories Compatible with M30 x 1.5 threaded connections of various radiator manufacturers Installation Easy to install with a simple screw mechanism To close the valve, turn the knob until the arrow points to 0 Usage Adjust the control knob to set the desired internal temperature Automatically senses changes in outdoor temperature for optimal performance Other information High-definition internal structure design for improved control Built-in frost