Supply Of Dry Type Return Air Filterdry Type Return Air Filter,Dry Type Return Air Filter Of Size 680 X 415 X 115 Mm Suitable For Lhb Type Rmpu Ac Coaches Confirming To R Dso Specification No. Rdso/Pe/Spec/Ac/0055-2003 (Rev-2) Drg No. Rdso/Pe/Sk/Ac/0073-2004 (Rev-1)Make:- Filtech, Usha, Maha Rani, Air Filter India. [ Warranty Period: 30 Months After The Date Of Delivery ] ]