[Closed] Anyone know the quad ring size for a Specialized Command Post

I've got an old Specialized Command Post on which I want to change the quad ring in the seal head. Not sure if there are lots of different models but there only seems to be a couple of service kits, should be about 23mm internal. I can buy a service kit with it but that is a bit pricey and wasteful as I don't need the other bits. Anyone know what size seal it might be. I'd rather not take it apart to measure then wait for the new one but that is plan B

[img] [/img]

Or, has anyone got one spare from a kit? They a pain to change so I suspect a lot of people who buy a kit don't use it.