Gem Bids For Refilling Of Fire Extinguisher Cylinders - Dry Powder Fire Extinguisher; 5 Litres; More Than 5 Years Refilling Of Fire Extinguisher Cylinders - Carbon Dioxide Fire Extinguisher; 5 Kg; More Than 5 Years Refilling Of Fire Extinguisher Cylinders - Carbon Dioxide Fire Extinguisher; 2 Litres; More Than 5 Years