Ortho Impression Trays - Perforated #6 Adult Large Upper Purple 25/Pk. Disposable impression trays designed for smaller mouths. Made of durable polypropylene material. Maximizes the retention of materials. Compatible with alginates. Ensures fast disposal and steady handling. Allows easy adjustments. Its perforated structure design promotes the efficient flow of materials within the tray for superior retentiveness. Polypropylene composition strengthens the disposable trays while maintaining flexibility for trimming and polishing.Non-slip handles guarantee a tighter grip and steady handling. Ideal for smaller mouths.