Supply of Pneuphonic Horn Air Operated Type B-7-30 To Wsf Pt.No. Ic-70010/3, Pamphle T No. Ai-228. Each Unit Should Be Emboss/Engraved With Makers Name, Month, Year & B Atch No. Of Manufacturing At A Conspicuous Place. Warranty Period: 30 Months After The Dat E Of Delivery