Rubbermaid Regeneration Letter Tray, Six Tier, Plastic, Black (86028) Go to amazon.com Related posts How to buy the best stacking trays for organizing? FeatureThe newest wave in plastic! Made with 25% post-consumer recycled plasticHolds A4 size documents and foldersSelf-stacking6 Trays DescriptionSelf-stacking style in sturdy plastic helps contain desktop clutter. Simple, clean lines go with any dcor.