I have a package of every o ring needed in the FX Crown, including the regulator o rings. One year old and in a vacuum sealed bag since I bought them. I don't know how many rings (some will be 5 others will be 10 or more) ....more than you will need for the next 10 years if you vacuum seal the extras. $25+$8 shipping
They are from the O ring store . Nitrile...the good stuff.
They are from the O ring store . Nitrile...the good stuff.