Magnetic 100mm x 100mm Filter Frame for Kase Armour Holder Allows any Brand of 100mm x 100mm x 2mm Thick Filter to be used with Kase Armour Holder. Armour Series. Toughened Optical Glass. Nearly Unbreakable. ***Please Note: Kase Armour Holder is Required but not Included*** Includes Plastic Case Kase Armour System . Armour is not Compatible with Kase K9, Wolverine or Skyeye Magnetic Filters.***