Gratnells shallow tray fits all standard school furniture. Molded in polypropylene with no rough edges and are fully stackable. Colorfast and chemical resistant. Fully recyclable and come with a 5 year guarantee. Made 100% in the UK, international award-winning trays are British Standards tested and passed for heavy educational use.Details:Available in multiple colors12.3" x 16.8" x 3"8 traysStrong and rigid, built to last and recyclableCompatible with Gratnells lids, inserts and racking systems (sold separately))Works with standard school furniture