supply of supply and fitment for replacement of existing (1) aluminum window bars (item no.4 ofdrg.no.lj54110 alt a and (2) window support: 3mm thickness (item no 12 of lj54110 alt.a) fromwindow in lws and nac cc coaches to modified items to be fitted with (1) ss bars of size: 12 mm x 1428 mm (item no.4 of drg no: lj 54110 alt b material spec 304: 04 nos & (2) window support: 5mm thick (item no.12 of drg no: lj 54112 alt b of size: 5x20x680 mm to material spec : 304: 01 no. (3) screw m5x12 (item no.11 of drg no: lj 54110 alt b): 04 nos and (4) screw m5x30 (item no.15 of drg no: lj 54110 alt b): 08 nos. note: procedure as per cai attached.