The FC-1 Filter Case is an accordion style case designed to hold five (5) 4-inch square or 4.5-inch round filters in individual padded sections. The case is cinched securely with an expandable strap. The handy pocket across the front has room for filter tissues and a small bottle of cleaner. It has a see-through window on top for quick reference notes.The FC-1 comes with belt loop for waist carrying or on the VB-10 Video Belt (sold separately). The optional FC-1P can add 1 or 2 sections to the case.Compatible with:-VB10 Video Belt -MB1 Matte Box Case