dry break fuel breather - size of retaining nut ?

[gixermark]

Hi Guys,

i am looking to remove the breather unit on the prosport... i imagine all the raducal dry break systems are the same - so if anyone knows the size of nut that retains the breather piece let me know... it looks 34mm or so, would need a veryy deep socket to get down in, so need to know exact size to source required tool....