Starter set expands virtually without limits in 10-sleeve increments with extension module Durable 5698 (sold separately). Two viewing angles, 30° and 60°. Weighted desk stand with non-slip rubber feet. Glare-free, polypropylene sleeves with rugged frames. Includes desk stand, 10 sleeves and 10 snap-on tabs. Gray Borders—Includes snap-on tabs. Extension set: DBL-569810. Rack Style: Reference; Material(s): Polypropylene; Sheet Capacity: 20; Number of Compartments: 10.