supply of heavy duty air cylinder 2a series to size 20 inch bore x 8 inch stroke x 3 inch rod dia to m / s parker model no 20 chb-2auv14ac8 or similar make of m / s bhavana fluid power or m / s island hydraulic or m / s hydrocare fluid power or m / s protel engg or m / s dowin hydraulics. note: piston, gland cartridge, and all seals shall be of viton material similar and interchangeble to parker make. for kind attention of tenderers special conditions for purchase of pneumatic and hydraulic cylinders 1 ) the firm should have been in the field of manufacture of hydraulic / pneumatic cylinders for the past 10 years. proof to be enclosed. 2 ) firm should furnish inspection / test certificate along with the supply. 3 ) firm should furnish warranty / guarantee for their product. 4 ) firm should furnish enclose list of units where their similar items are working satisfactorily. performance certificates from two such users should be furnished. 5 ) in case suppliers have been made to rwf earlier, details should be furnished for assessing past perforamnce4 in this case, item 4 above is not necessary