Capacity 18 oz. Includes one reel which adjusts from 35mm to 120/220. Will accept a second reel (not included) to process a second roll of 35mm film. Paterson Super System 4 Tanks are durable, easy to use and give consistent film development. The funnel-shaped lid fills and empties the tank rapidly to assure precise processing times. Both an agitator rod and a spillproof cap are included, so you can use either inversion agitation or rotary agitation. Paterson's auto load reel adjusts from 35mm to 120/220 film size quickly and has a ball bearing ratchet system for foolproof loading. After developing the first roll, you'll see why Paterson tanks are the choice of schools, pros and amateurs around the world.