Tender For providing of refilling of fire extinguisher cylinders - carbon dioxide fire extinguisher; 4500 gm; 4 years to 5 years,refilling of fire extinguisher cylinders - abc type fire extinguisher; 4 kg; 4 years to 5 years,refilling of fire extinguisher cylinders - abc type fire extinguisher; 6 kg; 4 years to 5 years,refilling of fire extinguisher cylinders - mechanical foam type fire extinguisher; 9 litres; 4 years to 5 years