Features: Main Material: Thermostatic radiator valve m ade of plastic and alloy material, not easily deformed or damaged. practical to use and with long service life. Temperature Adjustment Range: This thermostatic radiator valve affected by heating temperature and room temperature can sense changes in external temperature. no fixed temperature adjustment range. Wide Application: The TRV head radiator valve with anti-freeze protection and adjustment function, widely used for water, liquid, non-flammable gas. Easy To Use: The control handle is marked with a scale, which can control the indoor temperature according to your own requirements. What You Get: You will get 2pcs smart profession thermostatic radiator head with m 30 x 1.5 threaded connection. Specifications: Type: Thermostatic Radiator Head Material: Plastic, Alloy Color: White Size(D*H): About 50x85mm/1.97x3.35inch Bottom Outer Dia: About 33mm/1.3inch Threaded Connection: M30*1.5 Temperature Range: 6C to 28 C Working Pressure: 1.0mpa Maximum Pressure Difference: 0.1mpa Package Included: 2pcs x Thermostatic Radiator Head Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.