Dental Firing Tray Bracket The Dental Firing Tray Peg holds the crowns and bridges in a ceramic furnace. Variation in sizes and shape shows the compatibility with different porcelain restorations. Can tolerate the high-temperature changes without any distortion and change.Did not produce any harmful chemicals and gases during the firing The Dental Firing Tray Peg protects the crowns and bridge from impurities and color-changing during processing. Feature Material: Dental Firing Tray Peg made of the high-end plastic Uses: Used for holding porcelain crowns and bridges in the dental laboratory.