This is which Endotracheal tube:-

LASER TUBE USED FOR LASER SURGERY Laser Resistant Endotracheal Tubes The most frequent laser related complication is airway fire. Laser Resistant ETTs are used to prevent airway fires during laser surgery of the airway. Initially, fires are located on surface of ETT and cause thermal injury to tissues. If the fire burns through to interior of ETT, O2 and positive pressure ventilation create a blow torch effect, blowing heat and toxic products down into lung. Cuff puncture allowing O2 enriched atmosphere can also increase chance of fire after laser burst.