supply of dismantling and stripping of existing complete set of bellow duct etc.dismantling and stripping of existing complete set of bellow duct etc., dismantling and stripping of existing complete set of bellow duct from coach side and rmpu side with supply, installation and commissioning of complete set of bellow duct made of meta armide fabric with silicon rubber coating on both sides complete with metallic frames at both ends as per rdso specification no. rdso / pe / spec / ac / 0197-2020 ( rev.- 0 ) and as per icf drawing no. icf / sk3-7-6-072 alt.-a type-i, complete with accessories of various makes of rmpu of lhb type ac coaches. ( one complete set comprises 01 no. supply air bellow, 02 nos. fresh air bellows & 02 nos. return air bellows i.e. total 05 nos. ) [ warranty period: 60 months after the date of delivery ]