The description at andymark is wrong. this is the
clippard description of the part. The fitting is a push-to-fit for 1/4" tubing. It should be compatible with the other fittings that accept the "Bare" tubing also common in FRC. The little thing you removed is a plug to prevent contamination during the time the fitting does not have a tube in it. I cannot tell if there is another port at the other end. They do not use the plural for the description. You can tell by looking at it.
I will be envying you as I put threaded fittings in both ends of my white ones.
