s80 T6, year 2000, heater core O-ring

[trekking]

Dear All,

I have to replace the two O-rings between the heater core of my s80 and the tubes, but the part (I think it is part no. 8693268) was not at stock at my Volvo dealer. Can someone give me the exact dimensions, so that I could buy some generic O-rings?

Thanks,