SECURITY ELEMENT; THEY ALLOW CLEANING RAGS OR SPONGES TO BE WET QUICKLY AND EASILY. WHEN PRESSED IT FILLS THE UPPER CAVITY WITH A MEASURED AMOUNT OF THE LIQUID. THE SURPLUS DRAINS SAFELY INTO THE TANK. THE PUMP EQUIPMENT IS MADE OF BRONZE. THE PERFORATED GRID SERVES AS A FLAME ARRESTER; MANUFACTURER 1: JUSTRITE; N-PART 1: 10308