Premium Nylon CO2 Regulator Washers, Self Centering, Fits All CGA-320 Fittings (12) - Perfect Seal, Perfect Fit, Every Time!

Worked for my tank/regulator.

Appear to be reasonable quality, however, not in service for long.

They seal, they install easily but they are a little thicker than normal and don’t seem to last as long as others.

Using these to connect my CO2 tank to regulator for my kegerator. Hooked up my tank almost 9 months ago in my home and have had no leakage. Works on typical CO2 tanks.

I used these on my home beer serving system. I was previously using flat washers that the CO2 Gas Provider would sell me when I was swapping out my CO2 tank. I have always had a slow leak in my system. I gave these a try and the slow leak in my system is gone. These are the better mouse trap. I am using them on my CO2 tank regulator connection.

Stopped my co2 regulator to cylinder leak!

What you're looking for is smaller versions of this. Seems like the only other source for what might be the correct size, comes from England and very pricey

Every couple of months I switch out the CO2 tank for the beverage machine. I used to use fabric washers to seal the regulator to the tank but I had trouble with the seal leaking. I ordered a bag of these and ever since I've used these I haven't had one leak (and I'm now on the second bag).