Safety Radiator Direct Fit TRV Kit with sensor head attached (the sensor head would be outside of the case) This is what you get: angled valve, extension piece, lock shield valve, sensor head and plastic bush. knock out the larger hole use plastic bush angled body lock-shield valve fitted bottom opposite end with extension piece Purmo U.K. Rettig Park - Drum Lane, Birtley, County Durham, DH2 1AB Tel 0845 070 1090 - Fax 0845 070 1080 [email protected] - www.purmo.com