Rubbermaid Image Series Desk Tray Supports, Set of 4, Black (15411) Go vertical with your Image Stacking Desk Trays. Made from durable, high-impact polystyrene. The Image Series features soft, round corners and smooth radius edges for a modern, professional look. Works with Rubbermaid Image Stacking Desk Trays, sold separately. Pack of 4. Order 1 set per tier.