EPDM o-rings for clutch line - sizes?

[lem0nv0iture]

C4GP 1.6HDi mk2 (2015)

Engine code 9HC (DV6C)

Does anyone know what size the o-rings are on the end of the clutch line feeding into the slave cylinder please?
The o-rings I put on weeks ago have corroded (yep they're nitrile, which I now know should be EPDM 70). Citroen today quoted me £70+VAT for the entire line, as they don't sell just the o-rings so they "don't know" what spec they are. Uh huh.

I've tried measuring the ones I took off, but they're so gnarly I can't get a proper reading, and my calipers don't fit into the groove of the line end where the rings sit.

Citroen's part number is: 9806928380

[mickthemaverick]

You could contact this advertiser and see if they can send you the O ring even if only to measure? https://www.ebay.co.uk/itm/157089349901 ... R4L_wvv9ZQ

[lem0nv0iture]

Good spot! Thanks for the link.
I found an EPDM o-ring supplier on eBay that sent me what I think is the right size:

6mm ID x 1.5mm

Still yet to test on the road but while it's on the driveway having new lower arms, ball joints, driveshaft and a subframe ext joint bush moulded it's not leaking out!

[lem0nv0iture]

Reporting back after nearly four months to say the EPDM o-rings are still intact, no leaks! For a few quid off ebay, the o-rings will save anyone having to buy and install an entire clutch line from Citroen