Multi-Format 120 135 127 Film Darkroom Spiral Reel for AP Paterson Kaiser Developing Tank Reel Replacement Processing Accessorie Features: 1. Compatible with AP Paterson Kaiser Film Developing Tank, for film reel replacement. 2. 120 135 127 format film adjustable film spiral reel, it can meet different film development needs. 3. Self winding, it can hold one roll of 35mm/135 film and two rolls of 120 film for developing and processing at a time. 4. There are small steel balls at the entrance of the film head, which can prevent the film from sliding backward. (These spirals are very similar to the original Paterson reel with twin ball ratchet system.) 5. When you want to develop 2 rolls 120 film at a time, please use the separator. If not, please remove the separator when processing developing. Package List1pc Spiral Reels. _x000D_