supply of twin beam head light complete , twin beam head light complete with dc-dc converter suitable for 24 volt halogen lam p for electric locos. one set consists of [i].twin beam head light assembly -02 nos per set and [ii] dc -dc converter 01 no per set [ supply to be 20 percent of circular shape and 80 percent of elliptical sh ape) as per rdso spec.no.(i) elrs/spec/pr/0024[rev.1] sept.2004, amendment-1 dt.16.12.2004 for hd. light and (ii) elrs/spec/dc-dc converter/0021 [rev.1] sept 2004 amendment 1 dt.16.12,2004 f or converter. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]