The HVF-46 is designed to fit all 4 to 7 inch Flat panel or CRT viewfinders. Slips over the 3 sided visor of your monitor and synchs tight with a quick pull of the mounting belt. The mounting end has 4 barn door type flaps with sewn in gussets so that you get universal movable mounting flaps with no light leaks. If you have misplaced your 3 sided visor, you can mount the HVF-46 to your monitor using the adhesive Velcro tabs included with each hood. Made of sturdy nylon, foam and corrugated plastic inserts, you need not worry about rain or durability. Install a Hoodman Hood on your camera monitor to cut the glare and increase LCD visibilty in brightly lit shooting environments.