supply of fixed glass shutter with 5 mm and aluminium sliding louver shutter lh & rhfixed glass shutter with 5 mm and aluminium sliding louver shutter lh & rh,fixed glass shutter with 5 mm toughened glass along with aluminium frame. size:- 441 x 616 x 12 mm thick to suit bus type window assembly, with black powder coated. ls : 13871 1993, grade-b, as p er drg. no: ls/ay/bw/5-4-003, alt-c [ warranty period: 30 months after the date of delivery ] ] , aluminium sliding louver shutter lh & rh as per drg. no c&w.lgd.sk no. 1070 col 2 (lh) a nd drg no. c&w.lgd. sk no. 1070 col 4 (rh) for bus type window (lhb coach), material and specification as per drawing. [ warranty period: 30 months after the date of delivery ] ]