Introducing the Kase K9 Slim 100mm holder kit that comes with 90mm slimline Magnetic polarising filter. The newly designed, lightweight holder can hold up to three 100mm filters plus the polarising filter at once. The kit comes with adapter rings to fit 67mm, 72mm, 77mm, 82mm Lens Filter Sizes and will work with most 100mm 2mm filters on the market. The K9 features a new method of holding a circular polariser where rather than being mounted as the last filter; the polariser is mounted at the back of the system which will allow you to have up to three Neutral Density or Grad filters in front of the polariser.