I have few
different Mag tapes that don't have the Rack Hinges that
they hang on. I would guess they are different from model to model ???
They part with the black hanger-hinge is generically called a "tape seal"
and more specifically a "Wright-line tape seal".
There are similar seals with stiffer plastics used in auto-loading
(and auto-tape-seal-removing) tape drives.
And there are also thick plastic covers (usually with twist handles)
that can encapsulate the whole tape, including the reel.
don't forget the plastic "tupperwear" tape cases with soft plastic
covers :-)
-brad