SMART ADAPTOR for SCREW ON XLONG 21mm PIN Radiator 28 Valve=30mm Thermostat Head
TRV/Thermostat Radiator ValveADAPTOR FOR OLDEXTRA- LONG 21mm PIN ONLY, (See photo 2.). ValvesFITS SMART HEADS ONLY. This is a tough Fibre-Composite Shatter proof Adaptor, not cheap brittle plastic like others.