[KYhillbilly]

Quick question are the o-rings in these all the standard size and if not does anybody have a size chart?

And what are these worth?

I just picked one up cheap and it should only need an oring. Thanks

[Castro #66]

There's a good chance that both the hammer and valve o-rings are the same size as tank o-rings.

Value? Not much in the "normal" market, I think. They're probably easier to sell on Craigslist or otherwise locally.