I'm getting desperate!

I bought a set of 4 but dont recall where .When they arrived I was somewhat surprised. These are cone shaped and compress down around the casting but dont have a metal sealing ring.
They were cheap enough. They cant be overfilled to the point of bursting.
I'll give you 2 if you want them.
Without pictures of actual item from all the sellers mentioned above, you might recieve the very same. Good luck