The Drayton TRV3 Replacement Head (TRV 4C) is a traditional central heating radiator thermostat head designed for use with hot water radiators using the older, smaller diameter (28 mm collar) valves. This model features a horizontal orientation and is made of chrome and plastic materials, with a sleek white colour. Ideal for replacing damaged or malfunctioning radiator heads, this product ensures efficient heating and a stylish addition to any home. Trust the Drayton brand for quality and reliability when it comes to central heating radiators.