Large Format Film Developing Reels are designed to securely hold sheet film during development, preventing shifting, movement, or detachment. Compatible with various film sizes, including 4×5 inch, 5×7 inch, and 8×10 inch sheet film. Available models include a 45 Reel for 4×5 film, a 57 Reel for 5×7 film, and an 810 Reel for 8×10 film. Made from durable, chemical-resistant plastic, these reels ensure reliable performance. To use, simply insert the film, secure it with the locking ring, and load the reel into the developing tank. Package includes one developing reel, selectable based on desired film size.