I ordered a new set from P38 spares (once again excellent service) and then went about replacing the old one on the vehicle, when it came to changing them the old one didnt look to bad but I decided to change them anyway because I had bought a set, I used to be able to hear the compressor quite easily but after changing the not so worn out rubbers with the new ones I cant hear it at all what an awesome fix and it is well worth every cent!