| if 7cents equals 0.7 euros what does 70 cents equal.
I usually buy 4 or 5 O-rings at a time always useful to have a few spares.
I had to remove a broken coupler from the fuel pump once. Waited until I got the new one to check the thread size then drilled it out to core size then managed to dig the rest out with a sharp scriber, came out like a small plastic spring. | 
skidlids
Threaded Mode