• Radiator thermostat with 5 levels of temperature modulation. • Compatible with M30 x 1.5 threaded connection valves. • Includes frost protection and adjustment functions. • Made with high-quality material for greater durability. • Suitable for compact radiators with integrated valve block. • Outer diameter: 33mm. • Suitable coil size: 15mm. • Thread pitch: 1.5mm. • Inner diameter: 30mm. • Size: approximately 85mm. • Liquid sensor (hydrosensor) output: 230 V AC; 50Hz. • Adjustment range: 6–28 °C. • Material: high-quality alloy and plastic. • Includes 4 pieces of radiator thermostat head.