Optimized for developing multiple rolls of film at once, this Paterson Super System 4 Multi-Reel 3 Developing Tank can hold up to three 35mm rolls or two 120/220 rolls. Super System 4 tanks feature a high-impact polystyrene design that's durable, lightweight, and easy to clean. Included with this tank is a matching center column, funnel, lid, and agitator rod; reels are not included, allowing users to build a system of multi-format auto-loading to suit their needs.