This Omega Universal Developing Tank is an ideal developing tank for beginners. Made from plastic, the tank is easy to open and close, yet it's also a secure, lightproof way to develop your film. The included adjustable reel is relatively uncomplicated to load with 35mm or 120mm B/W film. Once the film is feed onto the reel, its back and forth adjustability makes it easy to correctly load your film in the dark. Additionally, the red cap can be removed from the top of the tank for adding or removing chemicals without exposing the film inside to light.