How do you explain a Klein bottle in text?

Only "continuous loop" tape cartridges use a closed loop of tape. The
infamous 8-track cartridge pulled the tape from the inside of the spool,
then fed it back to the outside. The tape has to be slightly twisted to fit
within a compact shell, but there is no net turning of the tape -- the top
edge of the tape remains on the top at all times.

I know of no tape system that used a Moebius strip.