Components included: Black light-tight tank body, funnel lid, watertight cap, central core column, and two adjustable plastic spiral reels.Capacity: Holds up to two 35mm film rolls or one 120/220 roll film on the included reels.Material: High-impact durable plastic designed for chemical resistance and easy cleaning.Use Case: Allows black-and-white or color roll film to be loaded in total darkness (using a changing bag) and then developed, washed, and fixed safely in normal room light.