Made of lightweight aluminum with a scratch-resistant, textured black powder coat finish, the District Screwpost Covers were designed to stand up to extensive use. Combine this Cover with the sheet protector, mounting sheet or adhesive hinge strip of your choice to create a custom portfolio. Designed to lie perfectly flat when opened, the District Screwpost Cover is as functional as it is eye-catching. Nylon jackets (sold separately) are available for all formats to protect your portfolio from light, dust and scratches. Expand the portfolio's capacity with standard screwpost extensions (sold separately).