Rapidrop RD023 SSP Pendant Quick Response Sprinkler, Chrome Finish, 68�C frangible glass bulb automatic sprinklers that are CE, VdS, LPCB, FM approved and UL listed. They are standard orifice fire sprinklers for installation in fire sprinkler systems designed in accordance with standard installation rules, e.g. EN12845 or the requirements of the authority having jurisdiction.