The Aluminum Letter Tray (2003) comes in a set of two, but can be stacked up to eight trays high when additional sets are added. The set consists of two trays and four connectors, which can be placed to hold the trays stacked one over the other, or slightly terraced so the bottom tray is easier to access. Functioning as desktop architecture, the entire Aluminum Desk Set promotes efficiency and organization, designed with the end user in mind. Using thin, durable aluminum that is anodized for further strength, the Aluminum Set is stripped of decoration, so only the necessities of function remain. Like the rest of the set, the trays have a unique AFS™ non-slip textured underside that makes it seem nearly magnetic, firmly holding it in place on any desktop surface.