HF3 gauze wax guards – £6.50 per pack with additional discount when buying a left and right. Free shipping is standard. Used on some Siemens and Resound hearing aids, colour coded red for right sided hearing aids or blue for left sided hearing aids. Pack of 15 – Standard size – 3mm diameter – not to be confused with Micro version 2.2mm diameter A lot more common than the micro version (HF4) ReSound RIE products that have S and HP2 receiver wires use cerustops. For a useful video showing how to change this wax guard click here Please note – we only ship to UK postal addresses.