Panasonic NV-VP31GL Manual page 25

(For Service usage)
VFK0823FSE
(For end users)
Type of Cassette
Cleaning Time
Tape Length
Usability in a Path
Note:
The tape material itself is the same in both types.
VFK0923FT
Full VHS Cassette
10 Seconds/Time
3.34 m
30 Times
25