For use only with the Paterson Multi-Reel 3 Tank to process of up to 6 sheets of film. The MOD54 film holder has grooves which take 3 sheets of film per side. These hold the film securely to ensure even development. It fits on to the spindle supplied with the Paterson Multi Reel Tank 3. Inversion of the the tank about every minute is recommended, and only 1 litre of solution is required. Available as a kit with the Multi-Reel Tank3. Code PTTK54.