Stackable 4-tier letter tray organizer requires no assembly, simply stack and use. Made of durable transparent material for easy visibility and quick file access. Features U-shaped groove design for convenient document retrieval and smooth dustproof surface that wipes clean easily. Modular design allows flexible configuration into 2, 3, or 4 tiers to fit various spaces. Each tray measures 9.45""L × 12.99""W × 2.7""H with total height of 10.2"", providing ample storage for A4 and letter-size paper, files, notebooks, and mail. Ideal for home, office, classroom, or studio use. Weight: 4.18 pounds.