supply of return air filter of size 840 mm x 490 mm x 50 mm as per rdso/pe/spec/ac/0055-2003 rev.2 or latest, with filter media compliance to en45545 hl (1-3) suitable to be installed in rmpu of vande bharat train.return air filter of size 840 mm x 490 mm x 50 mm as per rdso/pe/spec/ac/0055-2003 rev.2 or latest, with filter media compliance to en45545 hl (1-3) suitable to be installed in rmpu of vande bharat train.,return air filter of size 840 mm x 490 mm x 50 mm as per rdso/pe/spec/ac/0055-200 3 rev.2 or latest, with filter media compliance to en45545 hl (1-3) suitable to be installed in rmpu of vande bharat train. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]