Our Special Response Fire Sprinkler Bulb 5mm Thermo Bulb is a temperature-sensitive glass bulb that is commonly used in fire sprinkler systems. These fire ampoules are designed to break when they reach a certain temperature, activating the sprinkler system and extinguishing the fire. As a factory specializing in the production of fire safety equipment, we take great pride in our product's quality and reliability. Our fire sprinkler bulbs are made with the highest grade materials and strict quality control standards to ensure they perform flawlessly when needed. Trust us to provide you with a product you can rely on in even the most dangerous situations.