The JOBO 1501: Reel Duo Set is perfect for 35mm and 120 film reels in the JOBO 1500 series. With the option to adjust for either format, this reel can hold one 35mm film, one 120 film, or two 120 films using the red DUO clip (preventing film overlap). Take advantage of this unique feature and load two 120 format films at once with the small red DUO clip, all with just one spiral. The "DUO" name signifies the ability to use both 35mm and 120 film, as well as the convenience of loading two 120 films on one reel.