tender for louver part complete for lavatory window for lhb coaches as per drg.no. mi007169 alt nil with 10 pcs shim as per drg. no. lw54162 and 06 pcs ss screw (8 x 13mm). is for screw : is 7173-1989. one number = all items of louver part as per mi007169 alt nil + 10pieces of shim as per drg. no. lw54162 + 06 pieces of ss screw (8 x 13 mm) as per is 7173-1989) .