supply of supply & installation of one coach set of tm duct (below under frame) for memu/dmc/3ph coaches , supply & installation of one coach set of tm duct (below under frame) for memu/dmc/3ph coaches consist of : (a)ss tm duct fixing arrgt (driving end) to drg.no.74 5-9-0-008, alt-a, which includes : 1)ss air duct-1 at driving end to drg.no.745-9-0-004, alt- nil = 1no. 2)ss air duct-2 at driving end to drg.no.745-9-0-009, alt-nil = 1 no. and (b) ss tm duct fixing arrgt (non driving end) to drg.no.745-9-0-012,alt-a which includes : 1)ss air duct- 3 at non driving end to drg.no.745-9-0-006, alt-nil = 1 no. 2)ss air duct- 4 at non dr ving end to drg.no.745-9-0-011, alt-nil = 1 no. with adhesives given in the drg. note [ war ranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]