This is the hard to find 5MM replacement brass ferule for the plastic ARB air line.
These are often destroyed when the compression nut is over tightened or the air line is not lined up properly when the compression nut is tightened.
With this you can just cut off the end of the air line, slide on the new ferule and re-torque the compression nut.
We also carry the replacement O-ring for inside the compression fitting!
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