This 1/32” fingertight fitting is 0.57” (14.5 mm) long and comes with a PEEK ferrule.
VICI’s patented no-twist fittings are designed with a separate ferrule that snaps into the nut, so it is attached but will not rotate during tightening, thus avoiding the particulates commonly created with other one-piece fittings.
Sold in packages of 5. Since the ferrule is not machined onto the nut, it can be made from a variety of materials including FEP, PFA, PTFE, PEEK, glass-filled PEEK, and glass-filled PTFE.