Cant tell enough from the pic, BUT, it isnt Stratoflex 111, or Aeroquip 303, or any 100R5-6 SAE hose designed to work with those reusable hose ends. The ID may be right, but the OD, being smaller, will not give sufficient retention. The 'skives' or threaded part of the collar, is designed to screw on the hose, and TIGHTLY retain the hose end when properly installed with the proper hose.
If you dont want to use either 303, or 111 hose, and similar 100R5-6 hose is good, but you still have the limitations as the other hoses.
HUM---25 years old. UH---I'm guessing you have been signing off this aircraft every year. Even 303 and 111 have service life, and its NOT 25 years. Teflon, on the other hand, doesnt have a service life.
Be SAFE
Tom