Large Format Film Developing Reels specifically designed for various sheet film sizes. Compatible with 4×5 inch, 5×7 inch, and 8×10 inch sheet films. The reels securely hold sheet film during the development process, preventing shifting, movement, or detachment. A half-cup of roller-coated large-format film requires only 300ml of solution for optimal results. Made from chemical-resistant plastic for durability. Usage involves inserting the film, securing it with a locking ring, and loading it into the developing tank. Package includes one developing reel, selectable in sizes 45, 57, or 810.