supply of carbon brush for hitachi type traction motor confirming to rdso specn. no. elrs/spec/cb/0027.carbon brush for hitachi type traction motor confirming to rdso specn. no. elrs/spec/cb/0027.,carbon brush for hitachi type traction motor confirming to rdso specn. no . elrs/spec/cb/0027 rev.0 of sept. 2003 for carbon brushes for traction motor of electric locomotive and rdso spec no. elrs/spec/cb/0037 rev-0 for carbon blocks grade s for traction application and as per clw drawing no. 3twd.095.017 alt-9. [ warranty peri od: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]