This is a 5” diameter 8mm film canister with empty reel. Reel reads

Convert 8mm & Super 8 Films to Digital MP4 with KODAK REELS Film Digitizer

Magnasonic

Turn 8 mm and Super 8 memories into modern-day, digital films. The Kodak REELS Film Digitizer is exactly what you need to make old films into something more. Don't leave your precious memories on old film negatives. Scan your negatives through the digitizer and let it convert old, outdated media into MPEG-4 videos. Save all your memorable content on an SD card and take it with you anywhere you go. You can even connect the Micro USB cable to transfer your converted video files to your computer.

Kodak Reels 8mm & Super 8 Film Digitizer with 5 Screen

Magnasonic

Winait Super 8/8mm Digital Roll Film Scanner, Converts Film into Digital Video Max Support 5'' Reel - AliExpress

THE THRILL OF REEL FILM

Kodak Reels Film Digitizer review

Convert 8mm and Super8 to DVD

Kodak Reels Film Digitizer review

Old Standard Missile 2 (SM2) test film. Rare find - available nowhere else on earth. Recycled from naval surface warfare center. Empty case, normal

1990’s Vintage US Navy 7” 8mm Metal Film Reel Cans Canisters Cases--EMPTY

Why is film measured in millimeters rather than inches? - Quora