BEST FITTINGS Quick Coupler O-ring size

[pelletcaster]

Hi lads,

I'm filling my PCPs via a QC. Now the O-ring is worne, leaks and has to get replaced.

So anxiously trying to find the dimensions/specs for the small O-ring inside down a FOSTER-type BEST FITTINGS Quick Coupler QC02.

Thanks in advance for any useful information.
BTW - I sent an inquiry to BEST FITTINGS already but have to wait until after the weekend.

Thanks
Andy