Briggs med flo jet o ring size

[J beal]

Hey friends I am looking to replace the o ring on the main jet " bottom of carb " and was hoping someone knew the size of said o ring I think briggs calls the carb a medium flo jet it's for a 1966 6 hp thanks

 

[Rustyoldjunk]

I would just buy a assortment of small O rings or even make a gasket for it.