bids are invited for boq total quantity : 1 --of cylinders---1. refilling of co2 ext. cap. 4.5 kg 2. refilling of co2 ext. cap. 2 kg. 3. refilling of co2 ext. cap. 9 kg. 4. refilling of co2 ext. cap. 6.8 kg. 5. refilling of co2 ext. cap. 22.5 kg. 6. refilling of co2 ext. cap. 3 kg. 7. refilling and pressurisation of abc type fire extinguishers: refilling of fire extinguisher of 5kg capacity with is: 14609 abc powder and base material contents should not be less than 90 percent and pressurisation of fire extinguisher with nitrogen upto 15 kg per cm2. 8. refilling and pressurisation of abc type fire extinguishers of 10kg:refilling of fire extinguisher of 10kg capacity with is: 14609 abc powder with base material content not less than 90 percent and presuurisation of fire extinguisher with nitrogen upto 15kg per cm2. 9. refilling of nitrogen cylinder ( water capacity 9 liter and nominal charging pressure of 150 bar )