It's called a "repair package". Hard to tell from the pic, but there's part of the plastic lock that remains behind with the seals. They are actually pretty cheap at the dealer. You insert it into the hose or FPR until it snaps into place, remove the center plug and reconnect until it snaps again.
If you want to try reusing your old ones, don't lose the spacer. Put the parts on the male end of the rail feed, and the hard line to the FPR connector before reconnecting. Make sure you have a fire extinguisher handy.