Railway Carriage Fan, 110 Volts dc, 400 mm sweep, fixed type Brushless DC ( BLDC ) ( Sensorless ), conforming to RDSO s specification No. RDSO/ PE/ SPEC/ TL/ 0021/ 2005 ( Rev 3 ) with Amendment No. 1 with fan guard as per ICF Drg. No. ICF/ SK- 7- 6- 158 Alt ( G ) Col- II or latest. However, the firms may quote for latest Specn./ Drawing with amendment if any issued by RDSO/ ICF/ RCF. The successful tenderer shall supply spare PCB cards equivalent to 2 percent of ordered quantity of BLDC fans, these spare PCBs shall also have the same warranty period as the new fans.