The 3M™ Polycarbonate Crowns (Size 103, Upper Left Central, Box of 5) are preformed temporary crowns designed for easy adaptation and excellent fit. Made from durable polycarbonate, these crowns mimic the contour and crimping of metal crowns, allowing for seamless adjustment to margins. They come in a universal shade No. 62, which can be customized using cements and liners for improved aesthetics. These crowns are ideal for temporary restorations, offering a balance of strength and flexibility for dental professionals.