supply of supply and fitment for replacement of existing (1) aluminum window bars , supply and fitment for replacement of existing (1) aluminum window bars (item no.4 of drg. no. lj54110 alt a and (2) window support: 3mm thickness (item no 12 of lj54110 alt.a) from window in l ws and nac cc coaches to modified items to be fitted with (1) ss bars of size: 12 mm x 1428 mm (item n o.4 of drg no: lj 54110 alt b material spec 304: 04 nos & (2) window support: 5mm thick (item no.12 of d g no: lj 54112 alt b of size: 5x20x680 mm to material spec : 304: 01 no. make:-dhana sree engg work s-hyderabad/similar [ warranty period: 30 months after the date of delivery ] ]