White, disposable Weighing Tray made of PS material. These polystyrene dishes feature a round footprint for balance platform stability, as well as contoured sides for easy and secure handling. They are also flexible for dependable sample pouring, and can be heated to 200º Fahrenheit. Rubberized polystyrene material flexes to allow bending of the Weighing Boats. Weighing Trays are biologically inert and resistant to dilute and weak acids, aqueous solutions, alcohols and bases. Disposable boats stack compactly for storage.