supply of supply, installation and commissioning of air compressor ( screw type ) to the following specification, 1. en series tank mounted screw compressor with encapsulated design. 2. free air delivery: 54 to 65 cfm. 3. maximum working pressure: 12.7 kg / sq.cm. 4. normal working pressure: 12.5 kg / sq.cm approx. 5. tank capacity: 270 litres approx. 6. no. of stages: single. 7. cooling system: air-cooled. 8. motor power: 20 hp. 9. make: elgi or colt or similar. detail specification as per annexure. warranty: minimum one year from the date of commissioning. [ warranty period: 30 months after the date of delivery ]