Compact 120 135 Negative Film Developing Tank With Two Spiralsfeature: Equipped With Two Multi-Format Self-Feed Spirals The Simultaneous Rotating And Undulating Movements Of The Spirals Ensure That The Chemical Runs Uniformly Inside The Tank, Which Can Be Accommodated The 2 Rolls Of 13535Mm Films At A Time Or 1 Roll Of 120 Film Developing Tank: Unbreakable Plastic Tanks For Developing 120, 135, Black And White And Colour Films Heat-Resistant, Watertight And Opaque To Light Chemical Solution Requirements Are Shown On The Tank Bases 2 Spirals: Manufactured In Plastic Heat-Resistant Up To 100A C Quick And Safe Loading System A Small Stainless Steel Ball Housed In The Film Entry Track Ensures An Anti-Backward Movement Blocking System Processing For 13535Mm, 120220, 126, 127 Colour And B&W Formats The Spirals Will Fit The Paterson Tanks Compatible With Other Tanks On The Market Package: 1X Developing Tank And 2X Spirals