supply of set of pipes for lhb coaches consist. of 04 items (i) 25 nb pipe (s.s.seamless) to drg. no. mi005808 alt-c (bp) qty/set = 01 no. (ii) 25 nb pipe (s.s.seamless) to drg. no. mi005809 at. b (fp) qty/set= 01 no. (iii) 25 nb pipe (s.s.seamless) to drg. no. mi 006330 alt. nil (fp) qty/set= 01 no. (iv) 25 nb pipe (s.s.seamless) to drg. no. mi006331 alt. a (bp) qty/set=01 no. as per rdso sp ec-04-abr-02 or latest [ warranty period: 36 months after the date of delivery ] ]