Collapsible Magnetic Parts Trays are made from a durable and pliable silica material. The non–marring 4” x 4” magnetic base with five strong, embedded magnets holds the trays to most metal surfaces, while securing small metal parts inside. Each tray collapses to just 3/4" height for convenient storage. They quickly expand to 2” in height when needed. Collapsible Magnetic Trays are chemical resistant for durability in a garage environment while remaining easy to rinse and clean.