tender for set of frp cover for circulating air duct for lhb ac chair car coachesto specn. no. mdts-133, rev.05 & mdts-118, rev.01 (l.no.mt-31, dt. 21-06-2001 & dt. 12-09-2001)consists of: 1)circulating air lid (lh) lw64200,alt-nil,qty - 1 no.(with out item no.2 & 3).2)circulating air lid (rh) lw64201,alt-nil, qty -1 no (with out item no.2 & 3). 3)circulatingair lid (centre) lw64202, alt-nil, qty - 1 no. 4)circulating air lid (lh) lw64203, alt-nil, qty -1 no. 5)circulating air lid (rh) lw64204, alt-nil with anx-1, qty - 1 no. 6)circulating air lid(centre) lw64205, alt-nil, qty - 1 no.