I have all of these airtites left that have rings in them. The ones with the black rings seem to be a little bigger. The ring is really thin. I included a picture of one with a chip in it and there is still a little room left inside.
The others have little tabs on the side for easier opening. They have red and green rings instead of black. I have found that you need to put the chip inside the ring first and then put them in the airtite. One of the airtites does not have a ring with it.

Take all 20 for $5 plus $3.50 for first class shipping with tracking.