3L E-Z Runner Photo Mounting Adhesive Tape Dispenser Easy Picture Mounter

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3L E-Z Runner Photo Mounting Adhesive Tape Dispenser Easy Picture Mounter.
This seems to work, but I honestly don’t know how to use it. The end spins and I believe the tape inside comes out. I’m not sure if the tape is still good, I believe this unit is kind of old, maybe close to 20 years old. It’s in great shape and I have no reason to believe there’s anything wrong with it. If you know how I can test it just message me and let me know and I will. Otherwise please be aware I’m not sure how to test it and it’s untested. But the roller end does spin and tape does seem to come out. Thanks for looking