This is a 120/220 Film Spool for use with most 120 medium format cameras.
For loading 120/220 film, making a 620 Spool, or anything old school spooling that you like. These are the plastic spools 120 film, used in current 120/220 style cameras like Lomos, Holgas and Hasselblads, and all sorts of vintage cameras from Agfas to Voigtlanders and some Kodak 120s from the twenties. You can make your own roll, for respooling slit down film or bought in bulk, and also as a project spooling 35mm film into your Diana or Debonair. Also perfect for spooling yarn and embroidery thread for that matter. So spool away.