Nope.
Starts with an O and ends with ringS.
You see, it's like this:
I have a skimmer.
The skimmer I have is the same skimmer I had when "I have a skimmer" was a thing.
The O-rings on said skimmer I have that I had when "I have a skimmer" was a thing are the self same O-rings as when "I have a skimmer" was a thing.
When "I have a skimmer" was a thing you could buy the skimmer I have. But now, when "I have a skimmer" is not a thing, you cannot buy the skimmer I have. It is not a thing.
But, yet, I have it.
And so, even though "I have a skimmer" is not a thing, the skimmer I have is, and it needs new o-rings.
Without, it won't skim a thing.
But it isn't a thing. And so I need to special order the things for the thing that isn't a thing.
See? It all makes perfect sense.