The Ilford Simplicity Starter Pack contains all the photo chemicals you need to start processing your own black and white films. Each Starter Pack box contains: 1 x film developer, 1 x film stop bath, 1 x film fixer and 1 x film wetting agent in simple, single-use sachets. Each sachet contains the correct amount of photo chemicals to develop 2 rolls of 35mm (135) film or 1 roll of 120 film when using a 2 reel, 600ml developing tank.