PREMIUM MATERIALThe radiator valve thermostatic head is made of excellent alloy and plastic, with fine workmanship and good performance, which is durable and practical to use, not easily deformed or damaged. 4-PIECE RADIATOR THERMOSTATThe professional 4-piece thermostatic head radiator with M 30 x 1.5 threaded connections and is suitable for 30 x 1.5 threaded connections from radiator manufacturers. INTELLIGENT DESIGN TRV radiator valve with frost protection and adjustment function, can provide adjustment assistance and with liquid sensor and zero position. Suitable for compact radiators with integrated valve set. The upper limit of the zero adjustment ratio is 0, *, 1 to 5 NO FIXED TEMPERATURE SETTING RANGE This thermostatic radiator valve, which is influenced by the heating temperature and room temperature, can detect changes in outdoor temperature. no fixed temperature setting range. ADVANTAGE the thermostatic radiator valve is suitable for compact radiators with integrated valve block. The thermostatic radiator valve has frost protection and adjustment functions, can provide adjustment assistance, and is equipped with a liquid sensor and zero position. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!