Check the listing for details. 3/4" PENDENT SPRINKLER, Quick Reaction, Brass, (Date Code: 2023), UL Listed. Condition: New. Listed at 13.78 USD. 3/4" PENDENT SPRINKLER, Quick Reaction, Brass, (Date Code: 2023), UL Listed Manufacturer: Paratech, Co., Ltd. This Sprinkler contains a glass bulb that consists of a special liquid. Unlike conventional fuses, the glass bulb design simplifies the sprinkler assembly and size, ensuring stable operation at the designated temperature.