supply of bellow duct assemblybellow duct assembly,bellow duct assembly complete with metallic frames, provided with fire retardant epdm gaskets on both sides, 2 nos each for fresh air and return air and 1 no for supply air per rmpu, made of aramid/para aramid fabric with silicon rubber coating on both si des to rdso specn. no: rdso/pe/spec/ac/0197- 2020 ( rev 0 ) for rmpu for lhb eog/hog type ac coaches as per drawing no:rdso/pe/sk0069-2 004 ( rev.3 ) as per specn. rdso specn. no: rdso/pe/spec/ac/0197- 2020 ( rev 0 ) [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]