supply of 400 mm sweep sensorless brush less dc railway carriage fan as per rdso specification no. rdso/pe/spec/tl/0021/2005, rev.3 with amendment no.1, rcf annexure-1 with ss guard swivel type make rdso or icf approved sources.400 mm sweep sensorless brush less dc railway carriage fan as per rdso specification no. rdso/pe/spec/tl/0021/2005, rev.3 with amendment no.1, rcf annexure-1 with ss guard swivel type make rdso or icf approved sources.,400 mm sweep sensorless brush less dc railway carriage fan as per rdso sp ecification no. rdso/pe/spec/tl/0021/2005, rev.3 with amendment no.1, rcf annexure-1 with s s guard swivel type make rdso or icf approved sources. [ warranty period: 30 months afte r the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]