The Straight Universal Yankee 40 Slide Tray is spacious enough to hold a large number of slides and protects from scratches.It is specially designed to hold 40 2 x 2-inch slidesThis slide tray is compatible with a wide range of slides from brands such as Bell and Howell, Keystone, Sawyer, Ansco, Focal, Keystone, Sears, AO Executive, Kodak 300-500, Sawyer, Crestline, Minolta, Viceroy, and KindermanThis slide tray with lid features a dust cover to avoid the deposition of dust on the slides