Rolodex Products - Rolodex - Wood Tones Letter/Legal Desk Tray Stackers, 4 Tier, Metal, Black - Sold As 1 Set - Save valuable desk space with these sturdy all-metal posts. - Set of four stacks letter or legal trays. - Adds capacity by letting you stack your trays higher. Save valuable desk space with these sturdy all-metal posts. Set of four stacks letter or legal trays. Adds capacity by letting you stack your trays higher.