Snap 'N Store Collapsible Index Card File Box Holds 1,100 3 x 5 Cards, Black, Sold as 1 Each Snap 'N Store? collapsible, 1000-card capacity index card file box is constructed of black fiberboard with water-resistant laminate, steel corners and chrome label holder. Collapsible index card file snaps together. Sturdy black fiberboard construction. Steel corners. Chrome label holder on front.